1. an extremely fat, ugly, ratty-looking, wouldn't-touch-it-with-a-ten-foot-pole kind of dyke. the kind of lesbian no one would enjoy watching lesbian porn to.
2. used as an insult.
R: Dude, put your glasses on. That's totally a klesbian.
J: Holy shit, you're right, check out the caterpiller on her face!
"Hmm, not sure yet... Oh Wait. Definitely Klesbian. HAHA."