sicnasty 

something crazy, awsome, unpredictable, unimaginable, the best ever.

This girl walked by, and I turned around and she had a sicnasty behind.

sicnasty by Shadood July 2, 2007

sicnastee 

(adj.) a ghetto combination of the words "sick" and "nasty" used to describe a person or persons as both sick and nasty. (may also be used to describe animals)

plural form: sicnasteez
verb form: sicnasting-the act of being sicnastee

Jessica: Omg, look at Brittany's outfit!
Madison: She is sooo sicnastee.

Madison: Are Landon and Farrah back together?
Jessica: Yeah, they're a real sicnastee couple.

sicnastee by LadyScarz January 27, 2011

sicknasty 

So unbelievably awesome it can't be described. The phrase sicknasty is best used in the same sentence the words son and bro.

Oh, man that was sicknasty

sicknasty by rockstar4 July 13, 2010

Siconasty 

The description of one thing being both sick and nasty.

That dead possum is siconasty.

Siconasty by M.F. July 17, 2004

sicknastyyy 

the action of being totally awesome.

Wow, you and you're friends are soo sicknastyyy

sicknastyyy by lovaaaaa February 9, 2008

sicknasty 

too cool to even explain, too fucking awesome

Derrill is so awesome, but Kaythomps is SICKNASTY

sicknasty by KayThomps January 3, 2007

Siknasty

Anything cool or awesome, usually sports related.

That flip was siknasty. That wrestling move is siknasty.

Siknasty by Joshua v 13 July 19, 2016