unusably 

incapable of being put to use

The test system I am trying to test is unusably slow

unusably by Leachos April 16, 2008

literally unusable 

A phrase used when nitpicking small problems in computer software, sarcastically portraying something that is barely noticeable as so bad that they can't even stand to use the software any more.

See that menu? They are using "they're" instead of "their." Literally unusable.

literally unusable by thecodewarrior April 20, 2017

unusable 

a word that cannot be published in urban dictionary because it has real world consequences no matter how true it is.

unusable is any word that describes the true nature of todays politics.

unusable by hellboy51 February 2, 2017

Unusablepillows 

Something which has only aesthetic value, but seemingly should have some usefulness. Most hotel rooms contain several unusable pillows.

The Website was cluttered with unusablepillows.

Unusablepillows by @pacificfoodie July 13, 2011