Itâs basically when you and your mates go out on a madness kicking off the wing mirrors (normally when your drunk) of a car.
In a sentence:
Bob: âYo Jim!â
Jim: âWag1 Bobâ
Bob: âEarless cars!â
Jim: âohhhhhh....â
*Jim kicks off the side mirror off*
Bob: âohhhh shit, you really did it this time Jimâ