What you say when you're really about to shit your pants and the bathroom is either far away or occupied.
You typically yell this in a state of panic as you can feel the shit trying ever so desperately to jump out of your butthole. You clench like your life depends on it. Which in this case it lowkey does.
"Get out of my way! Fuck! POOP POOP POOP FART FART FART SHIT SHIT SHIT"
"The bathroom is, like, really far away, and do you see the line? It's occupied! Clench!"