fart police 

A person who is determined to figure out the source of a smelly fart.

Why is Bobby sniffing everyones ass. Someone must of called the fart police.

fart police by Stephen McDonnell April 9, 2006

police horse fart 

A fart so strong that it would be more effective at clearing an unruly mob than a police horse.

"Jeremy dropped a police horse fart and the pub was emptied within seconds"

police horse fart by WarrenG July 14, 2007