When scooby-doo gently jumps into shaggy's rectum and roughly shoves 6 inches of his tail in to his opening hole. Shaggy yelps in pain while jerking his meat stick and thunder clapping his cheeks for scooby while fondling the dogs hanging jizzy sacks . Shaggy proceeds to flip the dog and roughly shove his peins and scooby's weewee whole.

A casual invitation / threat used by an individual that is not afraid of fucking someone up.