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After one has anal sex with his partner he/she lets out a fart after being came in people often describe it as a musty smell hence the name musty cum fart
Man #1: oh god
Man #2: what?
Man #1: I just remeber when pyper let out a musty cum fart last night
Man #2: ew why did you have to tell me?
Man #1 you asked you dipshit
by Mr.Big but skinny penis August 10, 2018
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