shit out a shark
metaphor: To defecate any of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins and tough skin covered with small toothlike scales.
"hey mate, you'll be around to help me move on the weekend yeah?"
"Yeah i'm more likely to Shit Out A Shark, ya fuck knuckle"
"Yeah i'm more likely to Shit Out A Shark, ya fuck knuckle"