Being 100% confident with yourself that you need to fart, so you push as hard as you can to do the best fart possible. But instead of farting, you shoot shit at a fast speed directly into ones underwear.
"May I please be excused From the dinner table"
"Yeah sure Aunty Tayla, are you alright?"
"Yeah but I just Fartpedoed and need to clean this creamy behemoth out of my pants"