by Theone December 30, 2003

by mudpup April 24, 2006

by ebony.anne September 24, 2018

the be under the influance of methanphetomine
by jameshandpenis February 27, 2011

1.A term used for the Drug Crystal Meth Amphetamine
2A some what derogatory name for person under the influence of crystal meth.
2A some what derogatory name for person under the influence of crystal meth.
1. "They just smoked a fat bowl of gack."
or Thats some killer Gack!"
2. "That guy is a total effin gack." or "Quit being such a gack, your going to get us busted!" or "Never bring that gack over to my house again!"
or Thats some killer Gack!"
2. "That guy is a total effin gack." or "Quit being such a gack, your going to get us busted!" or "Never bring that gack over to my house again!"
by L8Nighter March 17, 2011

by Anonymous November 8, 2003

The sound made by an individual who is in the process of sucking dick. Typically a gagging sound made from the throat.
Brenda gacks on that niggas dick because she has a terrible gag reflex.
That chicken head is always gacking choad in the park.
That chicken head is always gacking choad in the park.
by Catsleeze September 23, 2013
