Necessitary 

A mixture of both necessary and necessity and can be used in place of either word.

Pants are necessitary.
It is a necessitary to wear pants.

Necessitary by missdallas2008 July 22, 2009

go commit cease vital function necessary for the prolonging of one's physical being 

The longest way to say go commit die

Trump: The longest way to say go commit die is now officially go commit cease vital function necessary for the prolonging of one's physical being
Robloxians: yeetus

go commit cease vital function necessary for the prolonging of one's physical being by lightbulb5x March 2, 2019

Necessary Evil 

Not liking something but understanding that it has to be accepted (sometimes) or it has to exist.

Nimueh says that money creates many problems but he cannot imagine ehat the world would be like without it. This is a necessary evil.

Necessary Evil by xsweet_vengeancex January 10, 2012

Necessity 

The fact of being required or indispensable.

It is an absolute necessity for Urban Dictionary to actually approve correct definitions and not trolling ones.

Necessity by Miss Fujoshi November 24, 2016

necessary erection

An unwanted boner used for the express purpose of shutting some dumb bitch up.

I didn't want to get one, but it was a necessary erection if I had hopes of shutting that hoe up.

necessary erection by Jaiger March 30, 2011

Morgan Necessary 

Usually a petite girl who is very good at hiding all emotions. She isn't just a snack, she's a whole ass meal. She probably has freckles that are adorable enough that most people could spend hours counting them. She is very deserving of Sam's love, which is hard to come by. She found herself a keeper in Sam.

"I'm sad, I wish Morgan Necessary was here to cuddle with me" - Sam

Morgan Necessary by YourLover2041 November 6, 2019

Necessary Helen

a girl who collects photos of people who are vomiting for her own sexual gratification after getting them drunk

That girls a necessary helen

Necessary Helen by broken lady November 23, 2010