Sorry, I was speaking IC ^_^
Caitiff are basically the illegitimates of vampire society. Everyone else has a Clan, a way to trace their bloodline and ancestry throughout vampiric society. For whatever reason, Caitiff don't get that tie in the blood, kinda like squibs.
In the Sabbat, however, they're called Panders and get treated with a little more respect. The Sabbat have very little actual organization and often cannibalize each other to steal their powers, so bloodline is far less important.
A Camarilla Caitiff can more or less just expect to get no respect whatsoever, but I was never suggesting it as an OOC thing ^_^