Meaning I owe you
Type Acronym
Rank ★ ★ ★  Common
Usage General (not just online)
Comments IOU can be used as a noun or a verb. For example, an IOU is an amount owed to another person. In conversation, IOU may simply be short for, "I owe you..."
Example "Thanks for driving to the game. Don't forget, IOU $15 for parking."
Updated June 1, 2010