to take a shit that involves all three states of matter in one bowel movement. A rare but beautiful feat which leaves the participant in a state of supreme euphoria after its completion. the trifecta most often occurs after a nite of heavy drinking followed by a greasy but delicious hang-over meal.
Ryan: Dude, you were in that can forever.
Brett: I know, I pooped solid, liquid and gas. I pulled off the trifecta!