Gibby Haynes-vocalist of the band butthole surfers, but specifically a large amount of crack cocaine. According to the book American Hardcore a Tribal History by Steven Blush, Gibby Haynes was a very prominent member of certain crack circles in parts of texas. In these said parts you can still purchace a "gibby" which is a large bag of crack. no specfic weight given just large.
wanna throw down fifty dollars? thinkin about pickin up a Gibby this weekend.