To turn one's back on, to show one's (clothed) backside to, as a sign of disrespect.
To fuck. (Compare bum (verb).)
To cheat.
To ramble; to move (or talk) aimlessly.
To move (someone or something) around.
The buttocks.
A cut of meat from the rump of an animal.
The hindquarters of a four-legged mammal, not including its legs
A remnant, as in Rump Parliament.
A lack or deficiency; an insufficient amount.