Top definition
Opposite of an IOU. Usually delivered more forcefully.
Yeah, he still owed me $50 so some buddies and I gave him a UOI.
by markhenry64 June 14, 2009
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug