When you're shittting on the toilet with a boner and your pee sprays up between the seat and the base of the toilet to either go on your pants or make a puddle on the floor.
Haha Peter must have hard mist sprayed look at the piss stain on his ass!
Son- "I think the toilets leaking from the bottom"
Dad- "no son, your hard mist spray created a puddle"