The process where 2 consenting gay men have sex by covering the receivers open mouth with cling film (making a small joy-pocket).
The giver then squats over the receiver and proceeds to fill the joy-pocket full of shit. The giver then fucks the receivers head until he is ready to ejaculate, at which point he releases an uber-thrust and breaks the seal of the joy-pocket, hence, filling the receivers mouth full poo and cum.
1) "If you don't shut your trap, I'll give you a San Francisco hot lunch"
2) "You don't know until you've tried it" "Fancy a San Francisco hot lunch ?"