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

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

Under Smile

A cute way of saying a vagina or pussy.

In Basic Instinct, Sharon Stone uncrosses her legs and shows her Under Smile.

Under Smile by Cody Humphrey December 20, 2008

Underskillable 

To understand

I underskillable the concept we learned in math today

Underskillable by ScottyParker123 September 10, 2020

Undermine 

to lower the standards

"...we are not going to undermine our community by creating or promoting alternative services..."

Undermine by JacobMS December 13, 2012

Russian Underside 

the russian underside is when your lady gets on top of you upside down and backwards and masturbates you with a 400 pound salmon while you masturbate her with a snow fox.

"Natascha, I think we need to spice up our love life"
"Boris, if you go to the fish store and get some salmon, we can do the Russian Underside and things will be so much hotter!"

Russian Underside by milkmaid604 June 13, 2007