noun

• (informal or childish, chiefly Commonwealth) The buttocks.
  "Okay, everyone sit on your bum and try and touch your toes."
• (informal or childish, chiefly Commonwealth) The anus.
  "John said that when he was little he stuck his finger in his bum and tasted his poopies and it was good."
• (East Midlands, slang, vulgar) An act of anal sex.
  "Go for a bum"

verb

• (UK, Ireland, transitive, colloquial) To sodomize; to engage in anal sex.
  "Your bars are fake and my bars are real; / Is it true you got bummed on a field?"

intj

• (UK, Ireland, childish, euphemistic) An expression of annoyance.
  "(more vulgar)"

noun

• (colloquial, sometimes derogatory) A homeless person, usually a man.
• (colloquial, sometimes derogatory) A lazy, incompetent, or annoying person, usually a man.
  "Fred is becoming a bum—he’s not even bothering to work more than once a month."
• (colloquial, sports) A player or racer who often performs poorly.
  "Trade him to another team, he’s a bum!"
• (colloquial) A drinking spree.