noun

• (derogatory, slang) A physically attractive person, typically a woman or otherwise feminine in appearance, who lacks intelligence.
  "Anyway, to make a long, dull story even duller, I come from a time when a guy like me used to come into a joint like this and pick up a young chick like you and… call her a ‘bimbo’."
• (derogatory, slang) A stupid or foolish person.
  "And one had to remember that most of the bimbos to whom Roberta Wickham had been giving the bird through the years had been of the huntin', shootin' and fishin' type, fellows who had more or less shot their bolt after saying 'Eh, what?' and slapping their leg with a hunting crop."

noun

• (business) Initialism of buy-in management buyout.