someone who uses meth an stays inside during the day and comes out when it's dark or night time. A meth user that does not like bright lights on around them. It comes from the words "gacked" and "dracula"
I don't like getting gacked with them! they get paranoid and turn all the lights off, they turn into gackula.
by S. 22nd street October 20, 2006
Get the gackulamug.