The action of putting jam on your hand and slapping a sleeping person across the back or stomach with slight force leaving a stick mass of jam and immensely confusing the victim.
I totally jam slapped that sleeping weirdo she's washing the jam off now.
Often called a "dirty look." It is when someone looks as if they are about to bitch slap someone (the person in which direction they are looking) but decides to show restraint.
Did you see vicki in science today? Jessica threw her a Visual bitch slap.