bum

bum
I
 /ˈbʌm/  noun  ,  pl   bums [  count  ]
  1 chiefly US, informal + disapproving : a person who has no place to live and no job and who asks people for money
   Bums [=vagrants] often sleep on the park's benches.
   a deserted building where bums [=derelicts] sometimes sleep
  2 informal : a person who is lazy or who does something badly
   Get to work, you lazy bum!
   “He didn't even bother to write.” “What a bum!”
  3 : a person who spends a lot of time relaxing and doing something fun rather than working
   a beach bum [=a person who spends a lot of time at the beach]
   a ski bum
 — compare bum, 5
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II
  verb  , bums, bummed, bum·ming [  + obj  ]
   informal   : to get (something) for free by asking : to ask for and get (something)
   Can I bum [=hitch] a ride with you?
   She's always bumming cigarettes off people.
  bum around ( or Brit   bum about) [  phrasal verb  ]
     informal  
   1 bum around/about or bum around/about (a place) : to spend time relaxing in (a place) instead of working
    I spent the whole day just bumming around the house.
   2 bum around/about (a place) : to spend time living and traveling in (a place) without a job or much money
    After graduation, she bummed around Mexico for a while.
 — compare bum, 3
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III
  verb  , bums, bummed, bum·ming
   US    informal  
  1 [  + obj  ] : to cause (someone) to feel sad or disappointed
  — usually + out
   The news really bummed me out. = I was really bummed (out) by the news.
  2 always used in progressive tenses [  no obj  ] : to feel sad or disappointed about something
   She's bumming because she can't go to the concert.
 — compare bum, 2
  bummed  adj   [more ~; most ~]
   He's pretty bummed about not getting the scholarship.
————————
IV
  adj  , always used before a noun
   informal  
  1 : of bad quality
   We lost money thanks to your bum [=bad] advice.
   bum luck
   I got a bum deal on this car. [=this car is worth much less than what I paid for it]
  — see also bum rap at rap, 1
  2 : not legally acceptable : not valid
   He's known for writing/passing bum checks. [=checks that promise money he does not have; checks that bounce]
  3 US : injured or damaged
   He has a bum knee/ankle/leg. [=his knee/ankle/leg does not function properly, is painful, etc.]
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V
  noun  ,  pl   bums [  count  ]
   chiefly Brit    informal   : the part of the body that you sit on : buttocks
   He slipped and fell on his bum. [=behind, backside, bottom]
   Get off your bum [=butt] and get to work!
  get/put bums on seats
    Brit    informal   : to attract people to see a movie, play, game, etc.
    She has the looks and voice that really get/put bums on seats.
 — compare bum, 1

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