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a female member of a group of friends who is often used buy the male members as a way of releasing sexual frustrations and frequently tossed aside after like a sock after a load has been shot into it
dave: dude, i just saw you grab karen's ass. do you guys have a thing?
greg: naw, we haven't even done anything. she's just the designated jack-off sock.
by NotASock March 25, 2010
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