when a woman has a penis in her mouth, anus, and vagina all at the same time.
I was hanging out with david, brad and justin the other night and I told them how I wanted them to tri-dick me. It was amazing!
by Jamilana May 24, 2008
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When someone had the birth defect of having three penises.
Person 1: "Did you hear that Joe has a tri-dick?"

Person 2: "Yeah, I don't wanna see his three penises."
by CarsonLaBen April 21, 2018
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