Underarm Armor

The little balls of deodorant that form under the armpit from applying too much or, for those who choose not to shave, from having too much pit hair.

Chris: Hey man what is this under my pit! I have lint.

Steve: Oh no dude that's underarm armor, you are now forever protected from the evil perspiration monster.

by Mrs. shaky bacon December 8, 2009

Undertaining

Not entertaining. Boring. Not interesting. mind-numbing, tiresome, And dull.

That guy Brian is sooo undertaining.

by BryGasm March 9, 2010

underhand slider

The action of female grasping to line up the penis for proper angle of penetration prior to intercourse; woman on bottom. Most common when a guy (freehanded) rubs the head of his penis around the pussy lips and doesn't insert; frustrated the female will grasp the dick with a underhand grip and slid it in. The man will immediately feel gratified as the woman was unable to hold out any longer and executed penetration. Excellence is measured when a woman who plays extremely hard to get gives an "underhand slider".

Matt: Last night I was messing around with Tiffany and to my surprise she gave me an "underhand slider"! I was teasing the shit out of her and making her quiver...she couldn't take it and underhand slid it in.
Zak: Those are the best.....Kristen holds out and acts like she doesn't want it but I get an "underhanded slider" nightly.
Jimmy: I get underhanded by Sam all the time....she love the dick!
All: HAHAHA

by Nomad Giz January 26, 2016

Undertail

under the tail. the asshole.
that's it.

so I was looking at some undertail yesterday

by TeraBite Gaming September 21, 2017

Undercards

A fangame that contains characters of Undertale and Deltarune. Some of them are fanmade. It is a card game made by a French person named Onutrem who plays Mario Kart and contains staff members.

Hey! Can you show me how to play the game Undercards?
Sure thing, but what is your card deck that you use?

by A Racist April 9, 2022

Urban Underachiever

One who spends all his free time posting new words to Urban Dictionary for their consideration.

Drew: Where's Aiden been lately, I haven't seen him?

Jake: He's always at the computer feeding new words to Urban Dictionary.

Drew: I didn't know he became an Urban Underachiever?

by shakerrr January 22, 2011

Undertaker

The man who is the best WWE legend.Also known as Deadman INC,American Bad A%$,The Phenom n the 7foot missle.The guy who whooped evry gr8 wrestlers' a%$e$$ at WrestleMania-the grand daddy of all the PPV.The man who has won a magnificent record 13-o at WrestleMania.The man who will nvr evr lose at WrestleMania.The man who deals wit the dark side.The man nt 2 b messed wit.The man who will bury u alive.The man 2 b reckoned wit.The man whose legendary legacy will nvr evr die.He iz the one n only THE UNDERTAKER!!!!!

frnd:who do u tink iz da best wretsler in the world
i:UNdertaker u stoopid maggot head freak.he has nvr evr lost a single WrestleMania match!!!

by abhizzle_dogg December 28, 2005