Usually referring to a woman that seems like an easy target for a one night stand while being free of any negative attributes such as (but not limited to) being fat, ugly/unattractive, diseased, infected, completely intoxicated, etc...
Guy 1: Yo man this girl is going to be a total freasy for me the way she is grinding on me tonight!
Guy 2: Oh yea! You better tap that soon before she is tanked and useless!
Guy 1: As long as there is even a faint pulse she's still freasy in my book.
A word used to describe someone who's gender is literally undecipherable. There is no word or sentence that could possibly get an answer out of them. Their voice doesn't sound necessarily masculine/feminine, Their looks don't look like a boy's or a girl's, not to mention they way they dress or do their hair, whatever. This does NOT apply to people who are non-binary or androgynous or anything similar.
Jeremy: Did you see Mikey today? They looked awfully freasty.
William: Yeah, I can never tell if they're a boy or a girl. Awfully freasty