Shit-Hawk Snooker
In a long line of parked cars, you can always guarentee that the red ones will be absolutely covered with guano. The Shit-Hawk itself (slang for seagull = Cornwall, pigeon = London) then comes back and selects another colour to crap on before repeating the process with the red ones. Hence the term 'Shit-Hawk Snooker' is born
Dude1: Jeezus man have you seen the state of my CAR? Its been shit-hawk snookered !!! Get me my gun !!
Dude2: What did you expect, its red ya CHOWDERHEAD!
Dude2: What did you expect, its red ya CHOWDERHEAD!