When a friend says they are going to do something, (usually crazy and as a joke) saying bitchcard means they must do that thing in the next 24 hours or they get bitch slapped. Does not work for if statements such as " if that happens, I'll do this"
Term coined by Denzel Washington in "Training Day"
Meaning:
one who is, while at the same time actin disloyal, is also actin bitchmade and like a punk, and is a fool-ass for thinking he gonna get away with it.