Mr Stabby Share definition Flag When you are on the loo about to poo but it feels like you have been on a diet of nuts, Shreddies, barbed wire and glass and it actually hurts to push it out. "Mr Stabby came to visit this morning and I think I have shredded my colon!" Mr Stabby by Uri Bent My Cock. January 31, 2015 Get the Mr Stabby mug.