n. 25B6; verb
I'll sponge your face : WASH, clean, wipe, swab; mop, rinse, sluice, swill.
(informal) he lived by sponging off others : BEG, be a parasite; live off; informal scrounge, freeload, cadge, bum; N. Amer. informal mooch; Austral./NZ bludge.