A portmanteau of "goth" and "thick", referring to an overweight member, usually female, of the gothic subculture.
(This word is impractical for actual usage due to "gothick" sounding exactly like "gothic", and in writing, people will assume misspelling.)
A goth hick. A hillbilly lookin mother fucker who has gothic tendancies. It's really sad trust me.
You fucking gothhick.