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.
That Biscuit Jack put his car in drive instead of reverse and smashed through his garage door!