gnast

n. something disgusting. from "nasty". alternate spelling of "nast".

Holy sheeaight, dat is sum kickin' gnast, yo!

by nekomi.net June 22, 2003

Gnast(y)

completely disgusting, horrendously sickening,

dude, that guacasalsa is gnasty.
Melinda? that bitch is a gnasty ho!

by daniel r May 29, 2003