A person that likes to have sex in front of an old person. Said person is usually mentally disabled and has no idea what is going on.
Guy 1: "My girlfriend is a geriatric exhibitionist.."
Guy 2: "Dude, not cool. That's gross"
Guy 1: "No, not really. Her grandma has no idea what the hell is going on. And if it gets her to give me a bj I'm perfectly fine with it."
by SexyLilKara June 18, 2008
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