I. ˈbəm noun
Etymology: Middle English bom
Date: 14th century
: buttocks
II. adjective
Etymology: perhaps from bum (IV)
Date: 1859
1.
a. : of poor quality or nature
bum luck
bum advice
b. : not valid or deserved
a bum check
a bum rap
c. : not pleasant or enjoyable
a bum trip
2. : affected or disabled by damage or injury
a bum knee
III. verb
( bummed ; bum·ming )
Etymology: probably back-formation from bummer (I)
Date: 1863
intransitive verb
1. : loaf
2. : to spend time unemployed and often wandering — often used with around
transitive verb
: to obtain by asking or begging : cadge
bum a cigarette
IV. noun
Etymology: probably short for bummer (I)
Date: 1864
1.
a. : one who sponges off others and avoids work
b. : one who performs a function poorly
called the umpire a bum
c. : one whose time is devoted to a recreational activity
a beach bum
ski bum s
2. : vagrant , tramp
•
- on the bum
V. noun
Etymology: perhaps from bum (III)
Date: 1863
: a drinking spree : bender
VI. transitive verb
Etymology: probably back-formation from bummer (II)
Date: 1973
: disappoint , depress — often used with out
the news really bummed me out