bum

The buttocks.

“Okay, everyone sit on your bum and try and touch your toes.”

The anus.

To sodomize; to engage in anal sex.

An expression of annoyance.

(sometimes derogatory) A homeless person, usually a man.

A lazy, incompetent, or annoying person, usually a man.

“Fred is becoming a bum - he's not even bothering to work more than once a month.”

A player or racer who often performs poorly.

“Trade him to another team, he's a bum!”

A drinking spree.

To ask someone to give one (something) for free; to beg for something.

“Can I bum a cigarette off you?”

To stay idle and unproductive, like a hobo or vagabond; to loiter.

“I think I'll just bum around downtown for awhile until dinner.”

To wet the end of a marijuana cigarette (spliff).

Of poor quality or highly undesirable.

“bum note”

Unfair.

“bum deal”

Injured and without the possibility of full repair, defective.

“I can't play football anymore on account of my bum knee.”

Unpleasant or unhappy.

“He had a bum trip on that mescaline.”

To depress; to make unhappy.

A humming noise.

To make a murmuring or humming sound.

A bumbailiff.