shiesty

Etymology
Probably from.  suggests that the word is a or. The noun sense is a reference to the rapper, known for wearing ski masks on stage.

Adjective

 * 1)  Shifty, untrustworthy, unscrupulous.

Noun

 * 1)  A black ski mask or balaclava.

Usage notes

 * Both the spellings shiesty and are roughly equally popular, and there is no standardized spelling.