Foop is a more widely accepted alternative to the word shart, a word made famous by the movie "Babysitter," starring actor Jonah Hill.
Friend's Friend: "Why not, bro? Just use your boxers instead of trunks!"
Friend: "Well I would, except I had a wicked foop the other day."
2. Call security there was a foop on the 3rd level that is causing hysteria