| IOU | |
| —n | |
| a written promise or reminder to pay a debt | |
| [C17: representing I owe you] | |
| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
Abbreviation for “I owe you.” An IOU is a written statement of a borrower's obligation to pay a debt.
| IOU a note of debt (from "I owe you") |