Definitions

1. noun

a person who does not work or has no regular income, especially one who lives by begging or stealing.

“He had been a bum on the streets for years, struggling to find a job.”

2. noun

a person who sits on a seat, especially a public seat, for a long time, often annoying others.

“The bum on the bus wouldn’t give up his seat for an elderly woman.”

3. verb

to hit or collide with something, often with force or violence.

“The car bumped into a tree and sustained significant damage.”