UB 

Ugly Bastard. Usually, a tag found in hentai. Also another word for Discord moderators.

People who are into UB are UBs themselves.

UB by Somite December 1, 2020

UB 

Unsoundness Bug. (software engineering lingo on technical community such as GitHub)

Does code that this PR(pull request) changes contain UB?

UB by scccc January 30, 2021

UB 

An ubercode

"I need to scan your UB"

UB by Defining English September 7, 2021

ub 

Someone who is CrAZA

hey Ub Its me mia

ub by Marcusandmartinusfan90 November 20, 2021

Ub 

U bad

Person 1: i cant believe i lost. I was so unlucky.

Person 2: ub

Ub by Forgefey October 29, 2023

ub 

abbreviation for urban dictionary

YOU ARE ON UB RIGHT NOW!!!

ub by TakoTheMemer November 20, 2023

üb 

A contraction of über-Christian; refers to people whose religious beliefs exceed the theoretical boundary of a normal person. Often found condemning heathens or reciting the Bible.

Dude, that chick is smokin' hot! Too bad she's an üb.

üb by Alex French November 17, 2003