look up any word, like rockabilly girl:
 
1.
cool awesome

This originated from typing "That's cool" with T9 during texting and accidentally sending "That's book".
Lisa: I went to the Plumb carnival last week.
Allison: Nu uh! That's so book!
by LisaNicoleBragg October 26, 2007

Words related to that's so book

awesome cool buke lame tight