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.