gacky 

something that makes you gack, often yucky

the food was gacky.

gacky by Pookett June 5, 2007

gacky 

nasty, horrible, disgusting

urgh, i had to open the window, cuz the car smelt gacky as fuck

gacky by mikepacker88 October 29, 2007

gacky 

uncoordinated, unco, sloppy, as in when running.

also used to describe something that is gack-like, gooey, sloppy.

hey man, i suck at running. i'm so gacky.

ew that's gacky!

gacky by mez05 September 19, 2008

gacky 

a nickname for someone that does meth. from the word "gacked"

hey gacky, are you gacked ouy today?

gacky by S. 22nd street October 20, 2006

gacky 

obesity. fattest person in the planet

wow, you are very gacky today lisa!

gacky by ur dads hoe August 16, 2022

gackk 

Extremely disgusting sex move. when a girl is giving a guy a blow job, he jams his dick far down her throat making her gag and cums at the exact instant the bile reaches her throat.

Dude! I totally gackked her last night!

gackk by differin12 June 24, 2005

gacked to the gills 

Obscenely high on any substance.

My boy Tommy is always gacked to the gills on some substance or another. That fool's crazy!

gacked to the gills by Quailsareneat December 30, 2011