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bis•cuit jack (biskit jak) n. pl. bis•cuit jacks A Biscuit Jack is anyone who makes a fictitious boast with the attempt to make themselves look better. A Biscuit Jack is someone who frequently tries to "one-up" someone else's story with one of their own in an attempt to capture attention. Biscuit Jacks are idiots or fools who are prone to doing dumb things. 1. Slang. A foolish or stupid person who attempts to raise their self worth through boasting far-fetched stories and accomplishments. 2. Slang. A habitual bullshitter. 3. Abbr. BJ. A Biscuit Jack. Someone who possesses Biscuit Jack-like traits and/or qualities.
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