Green’s Dictionary of Slang

uxter n.

[dial. uxter/oxter, an armpit or armhole of a jacket, thus the wallet that is carried in an inside pocket; note dial. come with a crooked oxter, to bring a present, to come with a good dowry]

money.

[UK]A. Morrison Child of the Jago (1982) 109: A-coshin’ a bloke in our alley / An’ takin’ ’is uxter away!