pronouced "game-over" it can be a noun or an adjective.
Gheymova is derived from the derogatory insult "gheymo" An encapsulation of the extreme derogatory nature of "ghey" and "homo" into one ultra-derogatory package.
Gheymova goes a step further to insinuate that the person in question is so much of a gheymo that they are not worth bothering with, with connotations to the term 'game over' and meaning its so bad its over before it started.
emma: that guy is such a gheymo
bec: fuck that hes a total gheymova.