grabass
From Interdex, the community-edited guide to the local internet.
The internet's favorite pastime. Because so many of its users have no importance in their daily lives, online communities are often rife with losers flattering each other for no other reason except that they're flattered in return. Prerequisites to be involved with grabass include knowing a group of people for some time, using their real names to the point of absurdity, talking to them on the phone when a fucking text conversation would be just as good, and defending them or their points in any discussion no matter what they've said.
Nine times out of ten, this is perpetrated by lonely guys towards one of the few women present in any internet community. Sadly, the women have just as many problems, and have no qualms about allowing greasy fat fucks to pretend they share a special friendship.
Child molestation is probably the biggest cause of grabass.
Also known by gender-specific euphemisms such as "circlejerk" or "daisy chain".