Internet
iou
What does iou mean?
Stands for "I owe you," acknowledging an informal debt or favor owed.
"Thanks for covering lunch — IOU one."
Origin
A written-debt abbreviation dating to the 18th century, used casually online.
Frequently asked questions
What does IOU mean?
IOU stands for "I owe you," acknowledging an informal debt or a favor you owe someone.
How do you use IOU?
Say it when someone does you a good turn, like "thanks for covering me, IOU one," or write it on a note representing money owed.
Where does IOU come from?
The written-debt abbreviation dates back to the 18th century, long before it moved into casual online use.
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