Is a phrase used to describe the heated sexual acts of sailors and their women after consumption of large quantities of rum
The sailors were up to some rumpy pumpy
euphemism for anal sex, often misinterpreted as a euphemism for sex in general
bored of regular sex, jeremy asked susan if she would mind him pumping her rump.
Anal sex. Specifically, heterosexual anal sex between a man and a woman.
She ate White Castle for lunch, so I had to wash my dick off real good after giving my bitch the ol' Rumpy Pumpy.