a person who avoids work and sponges on others; loafer; idler.

a tramp, hobo, or derelict.

Informal . an enthusiast of a specific sport or recreational activity, esp. one who gives it priority over work, family life, etc.

a ski bum; a tennis bum.

Informal . an incompetent person.

a drunken orgy; debauch.

Informal . to borrow without expectation of returning; get for nothing; cadge

He's always bumming cigarettes from me.

Slang . to ruin or spoil

The weather bummed our whole weekend.

to sponge on others for a living; lead an idle or dissolute life.

to live as a hobo.

of poor, wretched, or miserable quality; worthless.

disappointing; unpleasant.

erroneous or ill-advised; misleading

That tip on the stock market was a bum steer.

lame

a bum leg.

bum around, Informal . to travel, wander, or spend one's time aimlessly

We bummed around for a couple of hours after work.

bum (someone) out, Slang . to disappoint, upset

or annoy

It really bummed me out that she could have helped and didn't.

on the bum

Informal .

living or traveling as or in a manner suggesting that of a hobo or tramp.

in a state of disrepair or disorder

The oven is on the bum again.

noun

bindle , black sheep * , derelict , drifter , floater , gutterpup , guttersnipe , hobo , stiff * , tramp , transient , vagabond , vagrantnotes:a hobo is a migratory worker who likes to travel , a tramp travels without working , and a bum does not travel or work , drone , fainant , good-for-nothing , idler , layabout , loafer , ne\'er-do-well , no-good , slugabed , sluggard , buttock , derrire , posterior , rump , seat , frolic , idle , lounge , mooch , panhandler , sponge

verb

cadge , laze , loaf , loiter , lounge , shirk

adjective

poor , unsatisfactory