The word epiphany has two main meanings:
Continue reading: Epiphany Meaning | Definitions & Date
If you’ve spent any time on TikTok, Instagram Reels, or YouTube Shorts, you’ve probably come across the phrase “6-7” (pronounced “six-seven”). The phrase has become one of 2025’s most viral memes, but its meaning isn’t immediately clear.
The phrase “6-7” comes from the song “Doot Doot (6-7)” by Skrilla, released in early 2025. The line that sparked the trend appears in the chorus:
The way that switch brrt, I know he dyin’ (oh my, oh my God)
6-7, I just bipped right on the highway (bip, bip)
The exact meaning of “6-7” is intentionally vague. Skrilla hasn’t given a clear explanation, though some theories have emerged. Some speculate it might refer to 67th Street, possibly linked to the artist’s background or community. Others think it’s related to “10-67,” the police radio code used in some areas to notify of a death.
Despite these theories, most of the time “6-7” doesn’t hold a specific meaning. It functions more as a catchy, rhythmic phrase people repeat for humor or recognition, much like other viral slang phrases such as “skibidi” or “rizz.”
Continue reading: What Does 6 7 Mean? | Meme & Examples
Whether you’re downloading a report, signing a digital contract, or submitting a resume, chances are you’ve used a PDF document. But what does PDF actually mean, and why is it such a common file format?
PDF stands for Portable Document Format—a file type developed by Adobe that preserves a document’s layout, fonts, and formatting across all devices and operating systems. PDF is often preferable when you’re sharing confidential information or when you don’t want anyone to make changes.
A psychology professor asks the students to read a case study from an academic journal. The article from the journal website is a PDF so that the content and layout look the same for everyone who reads it.
Continue reading: PDF Meaning | What it Is and Why It Matters
BFF is an abbreviation for “best friend forever” that people use in casual conversation and very informal writing. When someone says “my bff,” they might be referring to their #1 closest friend or one of many close friends.
Although BFF is common in text messages and social media posts, people have been saying it since the 1990s (before online communication was common). According to many sources, the earliest use of BFF in the media was on the Friends episode “The One at the Beach” in 1997.
Rachel’s BFF works for a fancy catering company in New York.
We’ve been BFFs with Chad since 2010.
Continue reading: BFF | Meaning & Examples
YMMV means “your mileage may vary.” YMMV is an internet abbreviation that figuratively means “you might get a different result” or “you might have a different experience.” People use YMMV as a disclaimer at the end of social media posts and comments. YMMV is a reference to a common disclaimer in car advertisements about gas mileage.
In another online forum, someone asks, “Is a cover letter necessary, or should I just submit a resume?” Someone replies, “I’ve gotten lots of interviews without sending a cover letter, but YMMV.”
Continue reading: YMMV | Meaning, Origin & Tips
A PSA (or public service announcement) is a professional TV or radio ad that raises awareness about a social, environmental, health, or safety issue. Most PSAs are made by government agencies or nonprofit organizations. PSAs have covered topics like car safety, voter registration, Alzheimer’s awareness, and more.
Many PSAs nowadays are also published on YouTube and other online platforms as the main broadcasting format or to supplement a TV ad campaign.
PSA also has an informal meaning in online communication. Social media users sometimes preface posts with PSA when they’re sharing an important update or advice (e.g., “PSA: Tonight’s event is rain or shine, so bring an umbrella”).
It’s easy to mix up plurals and possessives with initialisms and acronyms, but the QuillBot Grammar Checker can help you write them correctly.
Continue reading: PSA (Public Service Announcement) | Meaning & Examples
LGTM is a workplace abbreviation that means “looks good to me” or “I approve.” Professionals use LGTM when they’re reviewing changes to software developer code, documents, graphic designs, and other work products. LGTM is a concise way for reviewers and decision-makers to give approval without writing lengthy feedback.
Continue reading: LGTM | Meaning & Examples
IMO means “in my opinion.” It’s an abbreviation that people use in text messages, chats, and social media comments. IMO usually goes at the beginning or end of a sentence that expresses a personal opinion. It should also be capitalized to show that it’s an initialism.
Most of the assignments in this class are boring IMO.
IMO, a college education should be free.
Continue reading: IMO Meaning | Text & Social Media
An acronym is a word that is an abbreviation for a phrase—such as the name of an organization—formed from letters in that phrase, typically the initial letters of each word.
For instance, NASA is an acronym that stands for National Aeronautics and Space Administration, and the word “radar” originates from an acronym for “radio detection and ranging.”
You can use QuillBot’s free AI acronym generator to help you devise a catchy acronym for your project, business, campaign, or creative idea.
Continue reading: What Is an Acronym? | Examples & Definition
TL;DR is an initialism for “too long; didn’t read.” It has two meanings and uses. When it’s a response to a long message, document, or online post, TL;DR means “this is too long, so I didn’t read it.” TL;DR also means “a summary of the main points.” When people write a long post or document, they sometimes include a TL;DR at the beginning or end.
The tips and examples below illustrate how to use TL;DR appropriately.
| TL;DR as a response | TL;DR as a summary |
|---|---|
| In a Reddit discussion about Mario Kart World, a user writes 4 paragraphs about why Peachette should be a playable character, and someone replies TL;DR. | On the family group chat, Julian writes 3 paragraphs about his daughter’s first day of Kindergarten. He ends the long message with “TL;DR she had a great day and loves her new school.” |
| A busy college student texts her mom about where they’re meeting for dinner. Mom writes back with a long paragraph about the dinner plans and several other things. The student writes back, “TL;DR, can you just LMK the time and place?” | Mariah writes a 5-page report on how the project management platform her company started using last year has reduced costs. In the email with the attachment, Mariah writes, “TL;DR this tool has reduced labor costs by 25%.” |
Simply copy/paste the full version into the interface, click “summarize,” and voila! QuillBot will instantly provide you with a TL;DR of the main points
Continue reading: TL;DR | Meaning, Uses & Examples
Even strong writers make grammar mistakes.
From sentence fragments to misplaced modifiers, small errors can have a big impact on your message.
Download our free guide to the most common grammar errors and learn how to write with clarity, precision, and confidence.
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