Phillip Seymour Hoffman's character in Along Came Polly comes out with the line "Hey Dude, we have to go! I just sharted"
To which he adds "I farted and a little shit came out!"
The meanings of "I just sharted"
1. Its when you fart to hard and you shit your pants 2.Describes what you do when your scared "oh my god dude..I just sharted.."
3.when you sundely fart very hard when your in class and shit comes out
4. Or its just a way of saying "I just shit and farted at the same time"
Person 1: "I have to shit really bad dude."
Person 2: "go to the restroom then.."
Person 1: *farts to hard and shits* "dude..I just sharted"