When one observes a predatory male touching feeling and generally harassing other females who are oblivious to said males activities.
Person 1: Do you wanna play the Greg game??
Person 2: Yeah go on, look at that fucker over there.
Person 1: Mate is he playing rock paper scissors and touching their thigh's, cheeky cunt!
Person 2: Fuck me, he's even getting away with it?!
When one guy gets naked and waits for his lover to come home then hangs his ass over the roll bars of the Jeep while his boyfriend fucks him in the ass.
Joey and Greg were doing the dirty greg when their parents walked in to the garage.