Q: What are you eating under there?
Q: What are you eating under there? A: Under where? Q: You are eating underwear? Gross! This is potty humor, an ambush joke, and also a joke based on a pun. The jokester asks a question and hopes that the target says the correct response. The initial question is ambiguous, so there is a chance that the target of the joke will be confused and ask "under where?" If they get a different response such as "what are you talking about?" or "I am not eating anything", then the joke fails completely The pun is based on the similarity of the words "under where" and the word "underwear", which sound very similar. This is the type of joke that little kids might say on the playground. Another version of this joke used by the band "Barenaked Ladies" in their song "Pinch me" I could hide out under there/ I just made you say underwear Which is even less funny than the original joke in my opinion.