can of ketchup Share definition Flag A girl who pretends to have her period so that she doesn't have to have sex. Doug: Jenn is so hot! Ian: Don't waste your time, she's just a can of ketchup. can of ketchup by Urs V September 27, 2008 0 0 Get merch Get the can of ketchup mug. Buy Now — $32.95 See more merch