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A cool alternative to the ugly sounding bull-S**t. It;s meaning can also extend to to something unfair as well as untruths
A: "Sorry you didn't pass your driving test"
B: "That's bulltwang man!"

or

A: "I swear I didn't touch her man!"
B: "We both know that's bulltwang!"
by Will-Dawg July 31, 2006
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