Sash just is. If you don't understand how to use sash, you're just not sash. Sash is an adjective, a noun, a verb, and an adverb. Sash is never used in a negative connotation. If you try to make fun of someone with sash, then you are not sash.
Oh my God. Beyonce is so sash. Did you see her sashing that performance last night? She was singing so sash, it was amazing. I wish i had sash like Beyonce does.