(Verb): The Act of doing promiscuous things on Facebook OR The Act of commenting/posting on many peoples walls, pictures, status's, and other things on Facebook.
John:Wow! did you see all the comments Alison left on everyones wall.
Sarah: Oh...yeah....she was slutbooking again.
Sarah: Oh...yeah....she was slutbooking again.
by Mr.Gabrielstein May 7, 2011
"I can't add any more friends on my account. Apparently, I went over the limit."
"What? Damn slutbook!"
"What? Damn slutbook!"
by Georgius January 29, 2008