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1. Butt Muscle
Douche Bag.
White Hat.
Poser.
D. Metzler From Baltimore Maryland
"Butt Muscle Is The New Douche Bag."
2. Butt Muscle
The name you give to a friend(or foe) , for being a dumbass.


DUDE!, i saw Matt talking to these hot chicks yesterday and he told me that he was busy, what a butt muscle!
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