look up any word, like jamflex:
 
1.
When one is both on myspace and facebook at the same time
Tom: Hey dude! Are you online?

Matt: Yea man! I'm just mybooking!
by MattQuin October 19, 2007
 
2.
being logged on to myspace and facebook at the same time.
Hey bob, what are you doing?
Oh nothing sheril just mybooking, all the cool kids are doing it.
by Brantlee Cote December 10, 2008