It's like in the movies, when the bad guy is blackmailing someone, telling him the side where to drop the money, and he's telling to do no wrong moves (no wrong moves = no funny stuff)
Drop the money in the yellow garbage bin in front of the post station. Think about your wife, so "no funny stuff".
if one feels that the comment/remark or passed event strikes them as something humerous one simply states the word "funnystuff". commonly used to replace laughing and normally ends said conversation
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).