(colloquial) A disappointment, a pity, a shame.

(colloquial) Exclamation of annoyance or frustration at a bummer (disappointment).

(Britain, slang, offensive) A homosexual male.

comparative form of bum: more bum

A car that travels at the speed limit to prevent the cars behind from exceeding it.

Obtrusively pushy; self-assertive to a pretentious extreme.

A light blow or jolting collision. / The sound of such a collision. / A protuberance on a level surface. / A swelling on the skin caused by illness or injury.

To knock against or run into with a jolt. / To move up or down by a step; displace.

(Internet) Posted in an Internet forum thread in order to raise the thread's profile by returning it to the top of the list of active threads.

(chiefly in the plural) Raised skin, usually caused by the involuntary erection of hairs on the neck or arms caused by cold, excitement, or fear.