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One who lies so much he actually believes his own bullshit.
Person 1: Hey look, a Bullshit Billy. Let's see what he has to say.

Person 2: I bet he thinks his truck will beat a Ferrari.
Person 2: How fast is your truck?

Bullshit Billy: It does 0-100mph in 4 seconds flat. It will smoke the fastest corvette made with 2 spark plug wires unplugged.

Person 1: HAHA thanks Bullshit Billy
by Elroy III January 14, 2015
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