Green’s Dictionary of Slang

one who begs for loans, a ‘sponge’.

a.1889		‘Catnach Broadside’ n.p.: There is a josser’s land, / Far, far away! / Where a drink they never stand, / Far, far away ! Termed Prosser’s Avenue, / Where of Pros’ you meet a few. Hundreds could much better do, / Far, far away! Faraway! Faraway! [B&L].
1910		Truth (Perth) 1 Oct. 4/7: The ‘finger’ who will get you / ‘On a string’ / Is a ‘josser’ who has likely / ‘Had a fling’ .