To joke on someone, to pull a
fast one; to be mischevious and devious in intent and nature; to fool someone or lead them on thinking
one thing, only to have them unpleasantly
surprised about the true result
Guy puts in
work all
night for this girl at a party. As they
go upstairs and get ready to have sex, the girl passes out before anything happens. The guy's response, SHANANAGAINS.