dutch punch
A punch you deliver to a third party on behalf of a friend or significant other who is either unwilling or unable to deliver swift, five-knuckled justice. Also known as dutch knuckles.
When Johnny called Sheena a liar, Casey dutch punched him because Sheena was too angry to speak.
Dutch Donkey Punch
A donkey punch delivered by some unexpected fellow who suprisingly appears and instanainiously donkey punches the girl for his buddy who is not ballsy enough to do it himself.
So I dutch donkey punch -ed your mom last night, thought your dad would get mad, but it wasn't him.