Everything’s Coming Up Milhouse!
When it comes to the Simpsons, Milhouse is the quintessential definition of the term “butt-monkey”. From the tenth season episode “Mom and Pop Art”, the Van Houten household becomes a target of flooding. Milhouse laments having to wear capri pants, but when the floodwaters reach his room, he is elated to discover that while his feet are soaking wet, the cuffs of his pants “are bone dry”, inspiring the infamous phrase.