bum 

Really sad British slang that the British use every time they try to define arse.

What's really sad about bum is that if only the British would say ass when they mean ass, instead of mispronouncing arse, they wouldn't need to define arse, and wouldn't feel compelled to say bum.

bum by Fly On The Wall January 3, 2005

bum 

A cat who can't play no ball!

Unathletic. No talent having mofo.

Don't pick that cat! That dude a bum!!

bum by reggie December 16, 2004

Bum 

Bum: Noun, Verb (Bumming), Adjective (Bum)

Someone who wears the same thing to school every single day. Usually a male with a broken backpack that doesn't zip up and only has one arm strap. A Bum must be a fan of the San Francisco 49ers and such a big fan to the point makes people hates the niners. A Bum gets picked on constantly, there are even official "Give a bum a deadleg day" "Beat a bum up day" etc. When a Bum is asked "What can Brown do for you?!" He must reply with "The real question is what can't brown do for you ;"

Lastly, Not to be confused.

Aliens > Bums

(Weight Training Class)

Bum: (Walks in Late, Ipod headphones in ears, No one is sure if the Bum is sober)

Weight Training Class: "MR BUMMMMMMMMMMMMMMMMM!!!!"

Bum by DownAlien June 30, 2011

Bum 

(verb) To let someone borrow, and if necessary keep without repayment.

I told him I could bum him a spare keyboard, but he ended up stealing the one from the store anyway!

Bum by Benry1 April 25, 2011

bum 

When someone really loves a certain thing. So much to the extent of it being annoying to others

"Hey you know that dave he really bums Slayer!"

bum by Ryan August 11, 2004

Bum 

To sodomise a human, animal or object (not including trees) not illegal if the other gives their consent

Shut up Laura, or I will Bum You, And Tom won't stop me

Bum by The Drinker Of Cum February 5, 2005

bum 

means love. like replace the word love in a conversation with 'bum'.

can also use words like

bumming (we're in bumming at the moment) bummer (he's a bummer)

eg, 'i bum that guy so much'

bum by mellie bum December 28, 2005