A sandwich that contains all aspects of a large dinner.
For instance: With a roast/Sunday dinner, one may put mashed potato, carrots, roast potato, chicken (or whatever meat you have) and possibly a Yorkshire pudding.
The kinds of Grandwiches are endless.
Bill: Man, I just chowed down on the most epic Grandwich!
Bob: ... Grandwich?
Bill: Yeah! The sandwich of all aspects; The Grandwich! It is legion, it does not forgive, it does not forget. Expect it.
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?!
n. Slang, A synonym for an american express card used for corporate purchases. Derives its name from the green color of the credit card typical of american express corporate cards.
Don't worry, the green genie's got this - Barkeep! Another round!