Bum 

North America/US - A person who has little to no ambition to attempt to have as good a life as possible, i.e an unemployed and lazy type person who may still live with others and having somewhat of a locust lifestyle. Also a term used for a homeless person/tramp.

"Dude what you gonna do when your boss fires you? Live on the streets like a bum!?"

British/UK term - the ass/buttocks/butt is often referred to as a person's 'bum.'

US/North America - "Sit your butt down on that chair right there."

UK - "Sit on your bum on that chair right there."

Generally worldwide a bum is a term that's used to describe a typical douchebag, lazy and unambitious person.

"Dude you live at home with your parents and have no job or no girlfriend... You're a BUM!"

Bum by Llewelyn Dowd March 28, 2022

bum 

1. A homeless person.
2. British/Australian equivalent of "butt".
3. To fuck someone up the arse.

A bum bummed me up the bum.

bum by super ultra hyper bishi bashi champ October 12, 2003

bum 

somebody considered to be lazy, irresponsible, worthless, and/or homeless.

patrick: taylor, why are you being such a bum?
taylor: i dunno. its just who i am

bum by psuts January 11, 2008

Bum 

An adulterous husband or wife.

I had no idea what a bum my lovely Mary was until two years after we were married.

Bum by talk2me-JCH2 August 27, 2023

Bum 

Someone that has nothing going on in life. Useless. Bad decision maker. Good for nothing.

Bj: Wiggins; you’re a bum.
Wiggins: hey man!

Bum by Adam one July 4, 2019

Bum 

to borrow or beg something from another.

Usually when a friend asks to bum a cigarette you know he won't ever give a loosie back to you!

Bum by talk2me-JCH2 July 16, 2022

bum 

A boxing term used to label easily-beaten and out-of-shape/unskilled/past-their-prime boxers who should never have stepped into the ring to face stronger competition.

He couldn't last a full first round against real professional boxers like Sugar Ray Leonard and Marvin Hagler and Thomas Hearns. Instead, his victories only came against a series of aging bums, each of whom were sent into the ring after being paid a few bucks by unscrupulous boxing promoters.

bum by Joe Bloggs II August 19, 2012