Green’s Dictionary of Slang

one-way pockets n.

a miser’s pockets.

1916		T.A. Dorgan in Zwilling TAD Lex. (1993) 43: (IS: Watching two hard boiled eggs try to make a getaway in a feed joint without slipping the waiter a tip) They’ve got those ‘one way’ pockets. You can only get the change in — it can’t come out.
1971		Wodehouse Much Obliged, Jeeves 120: The hundred to one [...] chance of extracting money from a man so liberally equipped with one-way pockets as L.P. Runkle.