when under the influence of large amounts of alcohol and/or other mind altering substances, you feel "nice". Nothing can stop someone who feels this good. you do not feel tired and are in a remarkably good mood
Me: damn mike over there is fucked up
Mike: yo man im feelin frosty as fuck
Me: oh shit, Bitches ain't ready
Mike: damn straight, im nice! you tryin to get at that Barry O?
Me: hell yeah! ima get frosty too my man