1. A tramp; a vagrant.

2. A lazy or shiftless person, especially one who seeks to live solely by the support of others.

3. An incompetent, insignificant, or obnoxious person: The batter called the pitcher a bum.

4. One who spends a lot of time doing a particular recreational activity: a beach bum; a ski bum.

1. To live by begging and scavenging from place to place. Often used with around.

2. To pass time idly; loaf. Often used with around.

1. To acquire by begging; cadge. See Synonyms at cadge.

2. Slang To depress, dishearten, or dismay. Often used with out.

1. Inferior; worthless: gave me bum advice; did a bum job of fixing the car.

2. Disabled; malfunctioning: a bum shoulder.

3. Unfavorable or unfair: got a bum deal on my final grade for the course.

4. Unpleasant; lousy: had a bum time at the party.