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A blowjob which is performed with the use of teeth, mimicking the motion and effect of a cheesegrater.
Trav: "Yo Nicko, that girl I brought home from the bar gnawed at my dick like a beaver"
Nicko: "Ugh, talk about Grate Sex, am I right?"
Trav: "No doubt about it, I liked it though"
Nicko: "You're a sick fuck Travis"
by Bruh That's Nasty September 07, 2016
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