underbrag 

To say something that would be a brag isn't true.

Not to underbrag, but my penis isn't like a club.

underbrag by DentonMD May 12, 2014

underbugger 

A person or annoyance that gets under ones skin and bugs them.

That squeaky door is a real underbugger. I think that new girl is an underbugger, she wont shut up.

underbugger by Christopher Evans August 2, 2008

Underexaggerate

1. To not exaggerate something that is too epic to be stated as simply as what it is in reality

2. To not exaggerate enough sarcastically (used commonly in fratire )

1. Awesome guy: Maddox is the bomb! \m/
More Awesome guy: Don't underexaggerate man!
Emo guy: I'll cut my wrists

2. Maddox: Celine Dion is an over-paid, over-cafeinated, botoxed bitch incapable of singing to humans.
Another awesome guy: Don't underexaggerate

Underexaggerate by maddoxlover(guessedbynow) December 3, 2011

underfag 

People in the Undertale fandom. They tend to be made fun of for being butthurt and cringe-worthy. Among other things, they are also annoying.

Hunter: Undertale sucks.

Underfag: Hey!! Undertale is good the fandom just sucks but Undertale is good and has good ships lol XDD!! Everyone has their own opinion!
Hunter: Then let me share mine.

Underfag: You're just being stupid let me have my own opinion!

Preston: They took the bait.

underfag by IgnitingInsanity May 26, 2016

underbreastimate 

to underestimate the size and/or weight of ones breasts.

be careful not to underbreastimate a women's tits; they are known to suffocate small animals and children!

underbreastimate by Matt Huff October 6, 2011

Underage Drinking 

1. Something that is punishable only in the U.S.

2. Something that 18, 19, and 20 year olds can be charged with in the U.S. due to their fascist drinking laws.

3. Something they don't allow 18, 19, and 20 year old American soldiers to do before they come home from Iraq in pieces with only an American flag handed to their family for comfort.

(in the U.S.) You are a month away from your 21st birthday and are drinking a beer! Thats underage drinking!

(everywhere else) Hahahaha look at that stupid drunk 15 year old!

Underage Drinking by MacDAS January 12, 2007

People Against Underage Driving In Reverse

People Against Underage Driving in Reverse, or P.A.U.D.I.R. for short, was formed on January 10th, 2007 after an accident in a residential driveway caused thousands of dollars in damage to a vehicle. The driver not named and under the legal driving age, put a truck in reverse and crashed.

The main mission of the P.A.U.D.I.R is to fight to keep residential streets, highways, and driveways safe from underage driving in reverse....

Oh Shit, People Against Underage Driving In Reverse are going to hunt that bitch down.

People Against Underage Driving In Reverse by Steve Perry January 12, 2007