Green’s Dictionary of Slang

a tiny sum of money.

1821		J. Burrowes Life in St George’s Fields 27/2: Scuddick a halfpenny.
1823		‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc. 156: Scuddick — is used negatively; ‘not a scuddick’ — not any brads, not a whinn, empty clies.
1838		‘Alfred Crowquill’ Seymour’s Humourous Sketches (1866) 133: It’s no go — not a scuddick.
1843		W.T. Moncrieff Scamps of London I i: Hasn’t a mag left – not a scuddick; is obliged to live on his wits.