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1. A rough muffler can be referred to as eating someones asshole out.
2.It is also when a man is getting a rim job and decides to flatulate on the woman's tongue therefore she inherits his wind in her mouth.
1.It felt so good when that bitch gave me a rough muffler

2.Sandy was giving me a rim job the other day, so i gave her a mean rough muffler!
by blackpeople May 21, 2007
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