U.D.I

Un identified drinking injury.

I've got a fuckin great bruise on my head, I can't remember how I got it , I was out on the piss last night.hence U.D.I.

by Christback2 May 14, 2014

U.D.

Ugly Duckling.

U.D. : ugly duckling.

by Set Blue 23 May 11, 2018

U.D. Names

When people put names/friends' names in the Urban Dictionary just to send it to them and say "OMG This description perfectly describes you!" and then they freak out and show their other friends and maybe post it on Instagram or Snapchat or something and they'll never know that you were the one who posted it!!!

"OMG you know those U.D. Names?"
"Yeah?"
"I FOUND YOU AAAAAAH OMG CUTIE!"

by youngsavage69 November 25, 2018

U.D.C

Unreasonable dumb cunt

Sometimes used as udfc or simply Uc.
A semi professional way of describing and intolerable individual.

I can’t believe that U.D.C. was asking for more money, s/he did a whore-able job.

by Better2bepissdoffthanpissdon July 26, 2019

U.D.

Comes from the television show Brooklyn Nine-Nine. It stands for Uterine Deposit and is pronounced like the first part of udder. It means sex.

"Let's get our U.D. on!"

by Xavhex February 8, 2025

Go U.D. it

To U.D. something is to look it up on Urban Dictionary.

Mike: What does Nerd Rage mean?

Ben: Why dont you Go U.D. it and stop being a noob.

by Saint Benjamin Thorne November 16, 2011

T u d

Touch your dick, something a girl says when she’s turned on or likes you.

Girl: I want to t u d

Boy: okay

by Yo moms a hoe May 15, 2019