Undestroyable 

An object that cannot be broken (Similar to Indestructible)

Dave: That phone is indestructible
John: Don't you mean Undestroyable
Dave: You what?
John: Undestroyable cause indestructible was broken!

Undestroyable by VajazzlePunani10 March 3, 2011

unretardedable 

Means when something can not be not retarded or stupid.

Dude that was so unretardedable.

unretardedable by nerdyninjalove August 12, 2011

unresponsives 

those people who, for whatever reason, choose not to respond.
like our local government, who forge ahead while ignoring all those who elected/are paying them

the unresponsives have taken over the project

unresponsives by yuba gurl June 22, 2012

unnesting 

The process of frantically renovating and redecorating in the wake of your teenage child leaving for college. Usually happens in the hours, days, weeks immediately following the teenage child's departure.

Now that her teenager had left the house, Sheila quickly shifted to unnesting; repainting, redecorating and transforming the former bedroom into her new quilting room.

unnesting by 1wild1 January 27, 2015

unestimated 

A word for people who are too lazy to spell underestimated

"braah , im smart dont get all unestimated on me skillz blud"

unestimated by pseudonympaddy June 8, 2016

Unrescheduable 

Event without the ability to be rescheduled.

I would have attended the movie premiere had I not had my sister's graduation, it was unrescheduable (is that a word? it is now.)

Unrescheduable by Amafire December 28, 2018

Unresolved sexual tension 

Unspoken lust and sexual desire. Can be used to describe the feelings of say, cartoon characters once they hit puberty and wants to shag.

I watched Ben 10 yesterday and there is a lot of unresolved sexual tension there lawl.

Unresolved sexual tension by CocaineLion69 May 5, 2019