Undent 

To not be dented. Specifically when your girlfriend's nephew dents his grandmother's shed and has to redact the dentage.

Brandon had to undent his grandmother's shed after slapping it with his balls.

Undent by Ticklebiscuits May 31, 2018

The Undertaker 

When you throw your partner off Hell in a Cell, and they plummet 16 feet through an announcer's table.

"I gave my GF a sexy The Undertaker last night."
"Is she okay?"

The Undertaker by ahmahm June 23, 2017

Unenthusiastic 

It’s an adjective and it means not having or lacking enthusiasm. If someone is unenthusiastic about something it means they are feeling indifferent, apathetic, passive, phlegmatic, lukewarm, listless, languid, lethargic, emotionless, perfunctory about it.

I’m unenthusiastic about having Malcolm on the team.

Unenthusiastic by AKACroatalin March 24, 2017

undertale 

Undertale is a game created by indie developer, Toby Fox. In it, you can choose to either spare every entity that appears before you, or slaughter them mercilessly. It has multiple endings, a fantastic soundtrack, and although it doesn't have the best graphics, its story, wittiness, and humor make it a very enjoyable game.

Undertale gave me big feels.

undertale by killermoobs October 14, 2016

underthink 

Verb: to think or analyze inadequately
(third-person singular simple present 'underthinks'; present participle 'underthinking'; simple past and past participle 'underthought' – informal 'underthunk' ) \ antonym – 'overthink'

It's a trick question; don't underthink it.

underthink by ΔиłĦ☼иצ ߀₡ʞ November 19, 2010

sans undertale 

a super smash bros ultimate dlc character.

im totally maining sans undertale tbh

sans undertale by Bidoof Is A Pokemon November 3, 2018

Sans Undertale 

A god among men.

YOOOO IS THAT SANS UNDERTALE!? OH MY GOD I CAN’T BELIEVE HE’S HERE!

Sans Undertale by s m a c c January 10, 2019