A salesman or saleswoman who hang out in hotel lobbies or convention lobbies and offer fellatio in return for a sale. Male lobby lizards tend to be closeted, overweight and unhappy with their lives. While female lobby lizards tend to be confident, hyper-sexual women who will do anything for a sale.
I met a lobby lizard during the techcrunch convention - I ended up buying his software after he traded me use of his body.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi