(n.) A person who is custy (see above).
"Did you see that custy? She offered to suck me for half a gram of shitty weed!"
"Ew, don't touch me, you custy freak."
2. Describes something completely filthy, disgusting, dirty.
3. Describes a girl that doesn't wash herself.
"This gym floor is custy, I'd never walk barefoot on it!"