What does all y’all mean?

All y’all essentially means the same thing as y’all. It is used in place of the second-person pronoun “you” to address a group of people. The addition of “all” typically serves to emphasize the size of the group.

The phrase all y’all (or “all of y’all”) is an example of a pleonasm (a redundant phrase), and it is often used for an intentionally humorous or exaggerated effect.

All y’all examples
All y’all better show up tomorrow. We’ve got a lot of work to do!

When I finally get done with this project, I’m buying all y’all drinks to celebrate.

QuillBot’s free Paraphraser can help you vary your tone in your writing.