A term made popular by the Jerky Boys in the 90's. It's a put down that describes either a fat guy with large he-tits or a body-builder with huge pectorals.
You think you're a tough guy, huh beefy tits, fruity-ass...
Allowing a girl to smear her period blood on your cock and then wrapping a rubber band around it, giving it the apearance of a massive twizzler.
She may try to eat it.