underfucker

the person who criticizes a lot

(at a lesson a person criticizes all the time)
me: He's such an underfucker!

by beduina November 6, 2013

Undercover cucumber

When you get a boner in middle school and you have to strategically get from one class to another without anyone noticing by using the cover of your Lisa Frank trapper keeper

I undercover cucumbered my way from Miss Cox’s Biology class to Miss Candy’s History class.

by HBC123 March 13, 2018

Undertale

An adventure RPG made by Toby Fox where if you kill anyone, insult Sans, or insult the soundtrack, the entire fucking fandom will want your head.

Person: "UNdErtALe's sOUnDtrAck SuCKs"

The Entire Fandom: *angry Megalovaina noises*

by TheCrazyCrafter23 October 20, 2019

old underwear

Sleeping with someone you've slept with many times in the past. They are comfy and familiar and easy to slip into.

"I ran into Steve at the bar last weekend and I slipped right into that old underwear, but I haven't called him since."

by bittermel June 24, 2008

carrie my underwood

A derivative of the name of American Idol winner Carrie Underwood. Used as a slang - a vulgar pick-up line for, well, getting her to carry your boner.

I want her to carrie my underwood!

by Barack my Obama May 27, 2009

undateable

Describes an individual so flawed that they cannot possibly be dated by anyone.

Mandy: Phil is so completely undateable. I have no idea why my cousin set us up.
Tamara: What happened?!?
Mandy: For starters, he is 35 and lives with his parents, and he smelled like rotten vegetation. And there were nose hairs.
Tamara: Agreed. Undateable.

by cherryblossom September 30, 2007

Undercooch

When a woman bends over and the back of her vagina is exposed.

Dianah just bent over and all I saw was her huge undercooch!

by KG$ January 11, 2009