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A special type of gaseous leak from ones ass that heads straight for ones own nasal cavity very fast. As if the fart Is going to give you a piece of his mind for birthing him.
I pulled off my covers only to be greeted by a grudge fart making me and my friends gag.

"Dude I swear that fart has it out for me! Must've been a grudge fart."
by M3NTALXHAZARD January 17, 2017
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