Top Definition
Act of love that involves the simultaneous use of at least three genitals, from this the name "tri" + "gen"
Richard: Hi dude, how did your Friday night end up?
Peter: Awasome! Jimmie and I met Annabritta and we had a fantastic trigen!
Richard: Cool man, you finally did it!
by themilfonian January 27, 2014
5 Words related to trigen

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