Underminer 

A person that will intentionally sabotage someone else through any means necessary.

He stole from me after I tried to help him, so I undermined him by making sure every business in the area knows that he is a shoplifter.

I am an underminer.

Underminer by Thingsda October 21, 2019

Underminer 

someone who picks their nose and their butt at the same time

You know that one kid in our 2nd period? well he's an underminer.

Underminer by Freyasoupy January 20, 2021

Vagina underminer 

A person who cockblocks a person with a vagina

I wanted to get with Nick so bad last night but Jennifer was being such a vagina underminer

Vagina underminer by NocklasKongo March 6, 2021

The Underminer

That interrogation scene from the incredibles perfectly describes the situation here.

The Cops "You didn't finish it either! Did you stop the underminer from inflicting more damage!?"

Idiots "No."

The Cops "Did you stop him from robbing the banks?"

Idiots "No."

The Cops "Did you CATCH him?"

Idiot "No."

Hym "What did you think was going to happen there?"

Idiots "I donno I just thought I could lie and then everyone would let me steal his life because of the things he said and then even if something bad happened it wouldn't be my because I can always just blame Hym for saying the bad things and then steal the credit for him saying the good things."

The Underminer by Hym Iam December 4, 2025

Undermindtm 

A clothing and accessory company started by Matthew Vargas in Morgan Hill, CA. Established in 2004, the company makes a wide range of products marketed mainly to the LGBT community.

Guy 1: That's a cute shirt man.

Guy 2: Thanks, I got it from Undermindtm, bro.

Guy 1: Let's make out.

Undermindtm by NickFirato October 19, 2011

underminiac 

Noun. A word blend of undermine and maniac. Depicts someone who cannot help them self from making undermining comments. As with kleptomania the underminiac is largely unconscious of this behavior even though it might seem like they take sadistic gratification from it. Their victims are often left realizing how badly they were trashed for days and weeks afterward as many of the undermining comments are not initially obvious.

Lunch with that underminiac will leave your ego in a coma for weeks afterwards.

underminiac by Swampybaby January 6, 2017

underwiper 

A girl/woman who wipes her ass under her pussy (or top to bottom) thus exposing her pussy and all pubic region to fecal matter.

Holy shit, I was going to eat out J-Lo last night, but when I got down there her shit stank like diarrhea. Bitch is an underwiper.

underwiper by slole1 April 21, 2009