underlaid 

Having gone without sexual relations for an unreasonable amount of time; by extension, the feeling of being "horny".

"Dude, I am so underlaid, I can't even remember what a penis/vagina* looks like".

*pick one or both

underlaid by Sneezing Wombat May 19, 2005

underside 

same thing as taint, gooch, etc.

it's the patch of skin between the balls and asshole. girls have one as well but it's not as funny.

it was so hot out my underwear was soaking up all the sweat from my underside.

underside by Feve July 25, 2011

Underidoderidoderiododeridoo 

Famous quote from Winston Churchill.

Me: Bro the quote "Underidoderidoderiododeridoo." speaks to me every time.
Random Person: What

Underidoderidoderiododeridoo by Comidiyan August 6, 2021

Underlord 

1. A low-level official who wields great power in a bureaucratic system -- the opposite of an "overloard."

2. Someone who can make your life miserable by enforcing obscure rules and regulations in a sadistic manner.

3. The true power brokers of bureaucracy.

Don't upset Marvin! He's the Underlord of the insurance claims division. With one click of a button, he can double your premiums or deny you coverage.

Underlord by Peter Kobs December 11, 2009

underlit 

Not as drunk, high or entertained as you would like to be.

1) When arriving late to a party I feel underlit.
2) These cheap drugs make me feel underlit.
3) Compared to other clubs this music is underlit.

underlit by RareNintendoGames April 4, 2017

undertail

Term used in place of Undertale when the content in question is NSFW.
Toby Fox, the developer of Undertale, invented the term in order to make it easy to distinguish between SFW and NSFW Undertale content.
Most frequently used as a tag for Rule 34 of Undertale.

/r/Undertail is a subreddit for Rule 34 of Undertale.

undertail by Smerg the Dargon June 19, 2016

underliving 

A substandard way of living in which the individual may be unaware or is fooling himself into believing that he or she is living at the highest or correct level.

Underliving is usually a consequence of factors such as ignorance, mental blocks, emotional disturbances, trauma, a lack of imagination, the habit of underliving, having grown-up in a family and/or neighborhood where most people underlived, the lack of good examples and role models, and other foolish reasons such as fear of success.

Because different people have different goals and standards, what one individual may consider to be underliving, another individual may consider to be living correctly, thus well.

Overall, compared to Americans and people in other highly (materially) highly developed nations, approximately 90% of the people who live in developing nations can be said to be underliving. Some Americans also underlive.

The Ph.D. candidate realized that he was not eating and dressing as well as he could afford to because he was stuck in the habit of underliving.

underliving by but for October 23, 2017