Bed-breaker

when a man shags a woman so hard the bed cannot hold up and gives way beneath.

An ass of a female individual that a male would like to have sex with in a wild and very powerful way, enough to break a bed, as aposed to a female who has a an ass to which a male would be gental during sexual intercorse. A 'Bed-Breaker Ass' is an ass ' you would rag the fuck out of so hard you'd break your bed'