IOU
IOU definition by Slang.net - The Slang Dictionary
This page explains what the acronym "IOU" means. The definition, example, and related terms listed above have been manually compiled and written by the Slang.net team.
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Are you financially literate?
Primarily, people use IOU to note that they owe you something (often money). This common acronym can be used as a phrase ("IOU a drink next time!") or a noun ("I left my wallet at home; can I give you an IOU?").
However, people also use IOU when asking others for a raincheck on a promised meet-up or item. For example, if you were supposed to meet your friend Greg for coffee, he might text "Can I get an IOU on that coffee? Something came up." This means Greg still wants to meet for coffee; he just wants to do so at a later time.