Generally used as another term for being extremely high.
Commonly a reference to being high on cocaine, which is known as "snow".
In Florida area is a prevalent reference to being so high on crypy that the brain feels frozen stupid.
I twisted up a game, sprinkled on some powder, I'm bout to get frosted.
On sambuca day, I turn up to skrillex , a cup of 'buca and get straight frosted.