The act in which you fill someones asshole with wheat grain before anal penitration, This is very enjoyable for the person receiving and giving.
by Anal_Rejection January 31, 2018
Anal sex of the variety during which the penetrating participant experiences an unpleasant sensation of coarseness or friction, usually owing to the receiving partner's having a bad case of dirty butt. Grainal sex is definitively disappointing, and typically leaves the receiving partner in discomfort or pain, while the giving partner will find himself with a bad case of poop dick.
It wasn't as great as I hoped it would be. After we were done, she was over there cryin' and my dick smelled like shit.. it was really grainal.
by The War Room December 10, 2010
by Blengfonker December 11, 2016