Bouncer

Part of speech: noun (n.)

1. One who bounces; a large, heavy person who makes much noise in moving.

2. A boaster; a bully. [Collog.] Johnson.

3. A bold lie; also, a liar. [Collog.] Marryat.

4. Something big; a good stout example of the kind. The stone must be a bouncer. De Quincey.