Muddy snow gun
A sexual act involving two participants wherein participant A lays down on their back with their legs over their head. Participant B places a mound of cocaine on the anus of participant A and positions their nose over it. Participant A then proceeds to blast a powerful shart out of their anus, propelling a shit-laced cloud of cocaine into the nose of participant B.
Larry, being an enthusiastic enjoyer of sniffing farts and doing cocaine, deciced to combine the two and try a muddy snow gun with a local prostitute.