A word which, although originally meant to laugh, now is used as a subordinating conjunction or preposition in times of awkness or randomness.
Toni (falls in hole): Ow
David: Shut the fuck up!
Peter: Did you watch Desperate Housewives last night?
Ray: Lawlcats no, I'm not gay.
Toni: So like, fer serious, whatchamacall it.
Ray: Lawlcats? What are you saying, whore?