folding stuff UK /ˈfəʊldɪŋ ˌstʌf/US /ˈfoʊldɪŋ ˌstʌf/ noun1 •(slang) Banknotes, paper money.Look at the money they drop in the sand. Halves, quarters, dimes, even the folding stuff. I've found two hundred dollars already this winter. — 1944