to be gacked is to be under the influence of methamphetemine
as in "I was so gacked last night that I took apart my vcr and cleaned it now I can't gety it back together"
by jon thomas (chipper-shredder) January 25, 2005
Get the gacked neck gaiter and mug.
extremely high and lacking in cooridnation skills or natural grace. Developing temorary speech impediment or just a low volume mumble.
"Too much amphedamines and three days of sleep deprivation has got me straight gacked yo."
by Heather j November 06, 2006
Get the gacked neck gaiter and mug.
adjective describing some one who is strung out on meth

oklahoma white trash vernacular
Shark was gacked, so I got the hell out.
by Orville Blick April 22, 2005
Get a gacked mug for your dad Paul.
Last night I had a few lines, and I was totally gacked.
by Theone December 30, 2003
Get a gacked mug for your buddy Georges.
An individual who is heavily under the influence of MDMA (ecstasy, caps, pills, etc.) namely characterised by their dilated pupils and gurning jaw.
Why is Jack's clenching up so hard? He's gacked as
by hellohi21 January 18, 2020
Get a gacked mug for your brother-in-law Trump.
"taken from", used to credit the source of material copied from one internet site to another, primarily used in blogs
"I gacked this meme from <maddog>"
by sheherazahde January 05, 2006
Get a gacked mug for your guy Yasemin.
To steal from someone else. Used often in blogs and such.
"I totally gacked this picture from Amy's site."
by Anonymous November 08, 2003
Get a gacked mug for your mate Bob.