IOU
NOUNS
► CALABASH ► CALIBASH a promissory note or IOU → M19 Aust. sl.
► COUPON an IOU, which has not and will not be paid off → 1996 US sl.
► MARKER an IOU → 1887 US sl.
► PAPER ► PAPERS any form of money order, IOU, promissory note or financial document other than actual cash → L18 sl.
► TAB the bill, credit, an IOU; used fig. to imply that an action, good, or bad, will be paid for later → L19 US sl.
► TICKET an acknowledgement of indebtedness; an IOU; a promise to pay → c1600 obs.
Lexicophilia 