Underpuss

The slight sliver of a woman's private parts that shows when she bends over in front of you naked.

I love it when I hit it from the back and I get that initial glimpse of underpuss.

Underpuss by ec31 June 27, 2016

Underboss 

Member of a mafia family, typically directly underneath the Don. Handles the mundane details of running a crime family.

The underboss put the capo in charge of making sure the hit was carried out.

Underboss by Roberto Manchez December 29, 2004

raving underpass

The act of dancing underneath a concrete structure, to any given beat. Usual participants are gothic warriors and princesses.

Buddy and Joe were raving underpass I-95 over the weekend.

raving underpass by WebstersBest June 8, 2016

underpaste

The uncomfortable feeling when the skin of the male genitalia is stuck together in the underwear.

A girl in my class saw me as I tried to fix my underpaste.

underpaste by LoLo1234 August 1, 2008

UnderLust 

An alternate universe of the game UnderTale containing almost everyone as lust filled monsters, and Mettaton EX as a shy talk show host.

UnderLust was created by nsfwshamecave on Tumblr.com

UnderLust by DepressingVoice16 June 28, 2016

Underbus

Verb used to describe the act of "throwing someone under the bus" or otherwise admitting someone's wrongdoing for them.

My sister was in trouble with my mom, so she underbussed me for something I did last week, and got herself off the hook.
An underbusser is a grown tattletale.

Underbus by misshappenstanc October 9, 2017

Underpits

Another word for armpits. A combination of underarms and armpits.

A word that makes me laugh.

Would you like to smell my underpits?

Underpits by Matilda o Donahue November 7, 2017