Crank, lower quality methamphetamine not the higher quality crystam version but the stuff that is brown some times and burns like hell. There are 2 types of gack. One eye and two eye. One eye refers to the burning pain and tearing in the eye after snorting. Two eye gack makes both eyes burn and water from snorting it in one nostril.
by PharmaPharmer December 30, 2005
Where I come from, Gack always refered to the residue left over from smoking bongs or buckets.
Gack was scraped out of the cone or the bucket 'head' and ususally chucked in an ashtray. However, those on the dole and rather skanky used to smoke this gack by wiping it on a rizla.
They were known as gack heads. Nasty.
Gack was scraped out of the cone or the bucket 'head' and ususally chucked in an ashtray. However, those on the dole and rather skanky used to smoke this gack by wiping it on a rizla.
They were known as gack heads. Nasty.
by Powdermonkey May 24, 2006
I was thirsty, so I gacked a Coke from his fridge.
If you like the ring, gack it when the clerk turns around.
If you like the ring, gack it when the clerk turns around.
by BlackArthur January 3, 2004
by Cane May 1, 2005
by J.J.W. November 22, 2004
The browny black substance found inside a firing tube after a big mix has been smoked through it,It smells terrible and stains lips, clothing and fingers
by erbivore198999 February 25, 2009