name

• (informal) Synonym of guy, term of address for a man or person.
• (slang, with "the") The Mackintosh Building at the Glasgow School of Art, Scotland.

noun

• (slang) An individual skilled in the art of seduction using verbal skills; a seducer
  "She left with him; he must be a true mack."
• (slang) A pimp or procurer

verb

• (slang) To act as pimp; to pander.
• (slang) To seduce or flirt with.
  "A show, a ho smashed back to the O Put them bitches on my beeper then pull some mo’ Cause I bump more hoes than acne I guess you bitch can’t learn that you just can’t mack me"

noun

• (British) A raincoat or mackintosh.
  "“Nothing very special, sir. He had a mack or coat over his arm, and a trilby hat. He wore a tweed suit, sir, I think.”"