Cybering (also known as cyber sex) is when two (or more) people (or as of 2009, Xorbians) on the internet have sex by sending their actions to each other via instant message or other online chat, such as AIM, IRC, MSN. It's a form of sexual role-play, which is when you act out via text. It's also the most common by far, surpassing quite a bit that D&D roleplay crap. 'Coz really, would you rather be hiding from orcs fighting dire rats or bangin' with a chic who can describer herself as your fantasy babe?