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slang A businessperson. The phrase refers to the formal attire worn by many businesspeople and is typically used in a mildly derogatory way. Oh boy, what are the suits from the corporate office doing here today? I never thought I'd be a suit and work nine to five in an office, but I actually like my job.
Do as one pleases, as in We had expected you, but if you don't want to come, suit yourself. This idiom, which uses suit in the sense of "be agreeable or convenient," is often put as an imperative. [Late 1800s]
See also: suit