underboobing

The act of hitting the underside of one's breast with ones head in one swift motion

"I keep getting underboobed!"
"When he underboobs me it hurts!"
"For some reason she enjoys underboobing people"

by magicalunicorns0509 September 29, 2014

underboo

A person who is obssessed with Undertale, and will go as far as write fan fics and etc. Derives from Undertale and Weeaboo.

You are such a fucking Underboo!

by Courier Six September 18, 2016

underbob

the act of masturbation with the non dominant hand...thumb facing towards the balls.

i have myself an underbob last night....felt like someone else was doing it.

by Geoski July 25, 2006

Underboob square lego eggs

its where you fucking lay down on the side walk with your ass exposed on a really hot day and have your friends grandmother cook eggs on it and sell them at walmart, keeping them heated in an easy bake oven. It helps not to get shit on them or fart in the old women's face, because she could die from inhaling toxic gases.

Hey dude i just made $5 from making Underboob square lego eggs with sean's grandma!
dude your horrible.

by Rem yo October 4, 2010

Underboob pen Challenge

The Underboob Pen Challenge is a trend that started in China in late January 2016. It has since then reached all corners of the Internet all around the world. The objective of the challenge is for a female to place a pen, or a similar object under her unsupported breast. It's supposed to prove weather that female is a 'real' woman or not.

Jill: Have you heard of the new "Underboob Pen Challenge?"
Sara: No, what's that?
Jill: It's yet another challenge that sets unrealistic beauty standards on women.

by Mymojodied May 10, 2016

sweat on my underboob

A term used by the Kubz Scouts when the gaming experience is getting intense.

I need to calm down, I have sweat on my underboob right now.

by kinno September 17, 2022

underbomber

someone who poops all over themselves accidently while wearing a diaper.

omg cindy did that girl shit herself? "ohh yeah we call her the underbomber because you can smell her from five feet away" she wears diapers but even that doesnt help with the smell."

by fjlskdnclkdj February 4, 2013