Trinput Share definition Flag Having Oral, Vaginal and Anal sex all in one session. Sally sure is a freak. She went down on me, then I hit it from behind, and then she slipped me in the backdoor. I hit the trinput. Trinput by Kalamazoot March 20, 2009 0 0 Get merch Get the Trinput mug. Buy Now — $32.95 See more merch