undankable 

1. unable to have the potential to be high quality.
2. someone/something that has reached the lowest level of quality attainable.

"The fact that Emily likes diet drinks is one of her most undankable qualities."

undankable by Billy Dunner November 1, 2011

undingable 

Cannot hold; be unable to stand up to or resist further

The noise was so undingable that I couldn't bear it anymore.

undingable by Jackey Javi November 16, 2016

undrunkable 

the inability to feel drunk during a day/night while drinking heavily. Usually occurs the night following a hangover.

Many have tried to fight this condition by keeping on drinking despite the lack of effect, this usually results in getting sick before feeling drunk.
The irreversibility of this condition has been disputed as some claim to have succeeded in eventually getting drunk.

tom: dude, last night was really lame
mike: really? i heard everybody say it was a sick party!
tom: well, maybe it was, but i was undrunkable..probably from drinking so much the night before...anyway, i gave up after a couple hours and just went home

undrunkable by yeahprobably June 17, 2010

The Unshankable Man 

A man that is not able to be shanked

Greg is the The Unshankable Man

The Unshankable Man by XxThe_WalrusxX January 20, 2010

Undeniable

When something just absolutely not be denied from obtaining a success

Thomas Jefferson High School for Science and Technology is undeniable

Undeniable by anotherasianguy2013 October 29, 2011

unlinkable

the opposite of link. to be unlinkable basically no one sees you, can make plans with you, etc. usually used by females in their bag or someone who wants to be introverted for a minute

everyone was moving around me funny so i became unlinkable

Kayla saw that I had money now and tried to see me. but I dubbed her and said I was unlinkable

unlinkable by XxAoCXx December 1, 2018

undatable

not able to be dated at all

the writer of this definition is undatable

undatable by c1094 September 11, 2013