The phrase free my man is a long running piece of internet slang used to mock defend someone who is clearly in trouble, and adding the name Butter makes this version specific and memorable. The clip spread as a short soundboard and meme audio where the joke depends on treating a small punishment like a serious injustice. It is still used because the wording is instantly quotable, works without any visual context, and can be dropped into gaming, anime or everyday fail edits without needing explanation for the audience.