English word Cobainiac comes from English maniac, English Cobain (A surname​.)

Detailed word origin of Cobainiac

Dictionary entry	Language	Definition
maniac	English (eng)	A fanatic, a person with an obsession.. An insane person, especially one who suffers from a mania.
Cobain	English (eng)	A surname​.
Cobainiac	English (eng)	(slang) A fan of American grunge musician Kurt Cobain and/or his band Nirvana.

Words with the same origin as Cobainiac