a pound or a punch
A London streetkid gives a rich person an ultimatum, give them cash or get ready to be hit harder than a broken chair.
"I'll take your quid or I'll knock you out like a sack of bricks!", A streetkid to a man in a suit.
"Your money or your face, pick one!", A London kid to a wealthy woman.
"I don’t need your cash, but I’ll take it if you don’t want a punch!", A streetkid to a rich kid.