Read This: The feathery origins of “Guess what? Chicken butt”

It is one of the simplest, most beautiful retorts in the English language. “Guess what?” “Chicken butt.” In just two words and three syllables, the interrogator has been made a fool in the eyes of all those present. The original question is utterly negated, and the respondent has clearly established dominance. “Chicken butt” is a conversational masterstroke, good for any number of occasions though rarely heard outside of the playground. The best part of the joke is that it’s timeless. Chickens are funny. Butts are funny. Chicken butts are almost incalculably funny. Those facts are never going to change.
But this witty rejoinder must have started somewhere. Over at Today I Found Out, in response to a request from reader Matt R., writer Melissa Blevins (no relation) delves into the origins of the “chicken butt” joke and traces its roots back to the Great Depression, when street vendors could be heard yelling “Chicken butt! Five cents a cut!” to passersby on city sidewalks. The “butt” in this context referred to a chicken’s shoulder, however, not its posterior.