underline 

To cherish someone forever

I’m going to underline you.

underline by Firewater2805 November 19, 2020

Underline Slopper

Slang for sucking on balls

Carl: "Yo Stewie, how was your date with Andessa?"
Stewie: "You wont believe me, she gave me the best Underline Slopper ever"

Underline Slopper by Seacole June 22, 2023

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

Undervibe

A term used for someone who is very sexually attractive but one can't put their finger on why. This word can be used to describe a person who isn't good to look at visually but the way they hold themselves makes them sexy.

'Wow that guy Mr Genc is hot, but i don't know why... he has this Undervibe'

Undervibe by Dee Undervibe December 19, 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

undertime 

Opposite of overtime. The difference between hours worked and the expected or contracted hours.

"I spent 35 hours in the office this week so I've got 5 hours of undertime."

"I've been putting in a lot of undertime lately, so I'm going to stay late tonight."

undertime by ben.hendry June 24, 2008