unneresticate 

to purposefully avoid teaching someone about sex

she unneresticated her son

unneresticate by forrest queen November 10, 2013

unnecessary douchebaggery 

An unwarranted action by someone who has an over-inflated sense of self worth, that has surpassed the level of jerk and asshole and borders on motherfucker

He called out of the blue, made plans, never followed through, then vanished as quickly as he appeared.

She showed interest and really talked the talk, then her actions showed she was full of bullshit.
These acts are great examples of total unnecessary douchebaggery.

unnecessary douchebaggery by The Misfitz April 21, 2017

unnecessexy

Unnecessary sexiness. An inappropriate sexy moment or situation.

The black strapless mini dress she wore at their wedding was so unnecessexy.

unnecessexy by caramimi September 10, 2009

UnNetHack 

A NetHack variant designed to feature more randomness, more levels, more challenges and more fun than vanilla NetHack. Changes include better graphics, improved user interface and several of the popular patches. It is a bit easier on beginners than NetHack although it still might slaughter you unfairly from time to time (to keep the original NetHack feeling).

If you're looking for something as close as possible to vanilla but without the soul-searing pain of unfunness that is vanilla's Gehennom, I'd go UnNetHack. I can't express it well, but UnNetHack captures the same feel of the best parts of vanilla very well.

UnNetHack by bhaak October 27, 2010

Unnecessary Sarcasm Boy 

Sidekick of Captain Obvious.

USO: Thanks, Captain Obvious!

Capt. O: All in a day's work, Unnecessary Sarcasm Boy!

Unnecessary Sarcasm Boy by Danny Valentine December 16, 2010

unnerve 

to frighten, or upset

you unnerve me!!

unnerve by stephanie June 24, 2003

Unnecessary urban dictionary entries 

Entries of peoples' friend's on urban dictionary. Often times, the submitter is a desperately obsessive and protective young fag who was born without testicles and therefore must impress his partner by entering their partners' names in as something like "cool!" or "funny" or, in the most severe of cases; "the best thing that's ever happened to me!" Get a life.

"stop the unnecessary urban dictionary entries and for god's sake, find a more creative way to express yourself.."

Unnecessary urban dictionary entries by mrcleansscrubbingbubbles April 30, 2009