Undersuit 

When a female buys matching bra and underwear to wear to look sexy.

You see Mia new Calvin Klein Undersuit, she straight sexy

Undersuit by Ty Cotton June 6, 2018

undersmile 

Euphemism for vagina. Coined by Joy in the TV comedy "My Name Is Earl".

Joy: "We gotta work backwards. Like when you rewound that videotape to see if Sharon Stone really flashed her undersmile."

With "flashed her undersmile", Joy is referring to the film Basic Instinct, specifically the scene where Catherine Tramell (Sharon Stone) distracts her interrogators by uncrossing her legs to reveal a lack of underwear.

undersmile by dee kay April 14, 2008

underslicer

When the urethral opening of male genitalia is elongated and extends down the head of the penis. due to this sick deformed abomination of a penis, any fluid secreted will simply drip down like a leaking faucet.

Carson: " dude what the fuck's wrong with your dick?"

Nick: "I thought everyone had one like this..."

Carson: "No you sick bastard! You have an underslicer!"

underslicer by anuscrab December 26, 2011

Underbite Chia 

Someone who has a major underbite with crooked teeth. And chia pet hair.

Wow! what an underbite chia you are!

Underbite Chia by shrogor cheet January 8, 2020

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

UnderLust 

An alternate universe of the game UnderTale containing almost everyone as lust filled monsters, and Mettaton EX as a shy talk show host.

UnderLust was created by nsfwshamecave on Tumblr.com

UnderLust by DepressingVoice16 June 28, 2016

undershirt 

1. what manuel neuer never fails to wear on pitch.

2. it is the teasingly thin cotton shirt usually seen worn by usually hot-the-ones-you-fancy footballers underneath their jerseys.

3. it is the very thing that most fans(girls) hate to see once the footballers pull off the shirts after the match.

4. it can be used as a test to see if a girl is straight or not. nuff said!

...after a germany game...

fangirl 1: hey look manu is pulling off his shirt! urgghh what's that thing he's wearing?

fangirl 2: why it's the undershirt!

fangirl 1: but he usually wears long-sleeved. i don't get why is it even necessary...

fangirl 2: yeah manu is mean. he needs to start attending the fanservice lesson.

fangirl 1: he so does. undershirt must be banned!

...both fangirl 1 and fangirl 2 started to appreciate schweini...

undershirt by inlovewithneuer September 2, 2010