The act of waiting for your girlfriend to go to the bathroom so that you can fart, but in attempting to do so you shit yourself, yell at your girlfriend to get out of the bathroom and then throw your shitty underpants out of her window and take a shower (even if you just took one).
"I sharted this morning and had to throw out my favorite silk boxers."
Often referred to as a poo caused by the unnecessary forcing of a fart, shart can also be used to describe a piece of art that one does not find appealing to their eyes/eye. "Shart" in this case is formed by the combination of the adjective "shitty" and the noun "art", which together create: "shitty art".
When Rick came across the popular piece of modern art, he gave his personal opinion on it "What makes this good? Really!? This is just shart! Plain and simple!"
I sharted at a restaraunt and took immediate action. I was trying to discard my underwear in the bathroom but people kept coming in. I decided to discard my underwear and drop next to toilet on floor vs. being seen discarding underwear.