gacky means: An acronym for meth addicts. From the root word “gacked”. (in Community Dictionary, added by Ignacio Gallego)

What else does gacky mean?

  • As in running, uncoordinated, unco and sloppy. Also used to denote something gooey and gacky. (in Community Dictionary, added by Aileen Parrish)
  • You will gack at something that is often disgusting. (in Community Dictionary, added by Laurel Villarreal)