some one that does alot of meth, same as gackaholic. from the words "gacked" an "addict". to be said as a joke.
by S. 22nd street October 20, 2006

when a gangsta does alot of crank or meth, crankster. from the words "crank" and "gangster". when he settrips well he's gacked.
by S. 22nd street October 20, 2006
