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Unique Identification Number.
A number that's unique for each person/user/etcetera. Often used in termes including IM-programs etcetera.
- Hey, what's your ICQ UIN?
- 55566677, you can add me now!
UIN by JennyF13 January 6, 2006
Related Words
UIN • uini • uinita • uinitoni • uinti • uina • Uinah • uinc • uing • Uingslopson
to be of no use
omg she so uin
uin by ayla shayla April 10, 2020
Unique Identification Number.
A number that's unique for each person/user/etcetera. Often used in termes including IM-programs etcetera.
- Hey, what's your ICQ UIN?
- 55566677, you can add me now!
UIN by JennyF13 July 26, 2008
an alien whos so incredibly kind. you are kinda a softie and you're an ambivert.
bonus points if you like flower language
"uin is so cute"
"hell yeah."
uin by dallas deez ni November 22, 2021
Someone misusing his true good intentions/love.
He is not dumb, he is just a Uin.
Uin by Senpai Khryss October 25, 2024
The perfect guy. He is funny, sweet, talented, and ridiculously hot. He looks older than he is, but when he can act like himself he’s silly and adorable. He is an amazing boyfriend and kisser.
That guy is so hot and funny, he must be a uinto
uinto by rollypolly28191 May 30, 2020
More from Urban Dictionary

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
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