A Misidentified fart is when you think a fart is either a small or regular fart but turns out to be a huge load of diarrhea that fills you pants.
Jim: hey John that fart sounded like you shit you self.
John: yeah ummm....it was a misidentified fart
This happens when you hold it in too long and it has built up inside and has become hard to get out. But when it dose come out it hurts your whole body.
Guy1: you took a while in there you good?
Guy2: no man my body hurts I think I pooped a duke. I didnât think Iâd poop a duke