I've seen groups of men in the professional world who commonly rip on whoever is absent from their circle at that time.
Whoever is absent? Sounds like women. I was going to make the same response to Lolgaxe, that guys pretty much rip on each other merely because an opportunity presents itself. However, I don't know many guys who bother trying to do it behind someone's back. All of my friends rip on each other face to face, because it's funnier when the victim is there.