Somewhat likeSexting, when you have "sex" over texting, but having "sex" over xbox. Usually between male and female gamers but may be done by two males or two females.
I was just seXBOXing with this girl while we were playing call of duty! She had the hottest voice ever!
Sexbooking is the act of performing verbal sex over facebook. Wether this be through wall posts or comments, maybe even perhaps photos, one facebooker to another will talk in a sexaul or decieving way to the other.