skilthy 

a filthy skank from uconn. skilthies are the dirtiest of them all and tend to loiter in the hallways of all boy dorms. to be called a skilthy is one of the worst insults in the history of insults. skilthies can range from fat and ugly to just plain dirty.

bob: yo there's a skilthy in the hall!

mike: ew.

skilthy by roldie lee February 1, 2009

Silthy 

A silly, filthy individual.

Catman is very silthy.

Silthy by Zinogre August 14, 2014

Silthy 

The combination of the words “sick” and “filthy”. Often used ironically as a colloquialism in douchebag conversation to describe clothing, cars, or deviant behavior.

“Yo, bro. That new ride is sick. I mean filthy. Hell its silthy.”

“This new watch is silthy, bro.”

“That girl is hot and gets around, bro. She’s down right silthy.”

Silthy by Sarcasm25 May 16, 2018