look up any word, like cleveland steamer:
 
1.
to diss or ignore intentionally
So I called G today and she totally bookbagged me for Curt.
by Emily Livermore September 24, 2005
 
2.
A ass that sits on your back and is more square than round, resembling a bag with books in it
Jayden- Yo dawg I need a boo thang with a fatty
Kyle- Well dont mess with Cindy nephew she got a bookbag
by BfloHunnydew November 15, 2011
 
3.
A secret way to tell someone a girl has small boobs
"dude! Look, that girl is bookbag!"
by PsEuDoNyMduhhhh January 25, 2009
 
4.
Noun:

1) A very large purse, often covered in emo band paraphernalia.

2) Device used by a band geek to carry possessions, such as CD players and rather stupid things that shouldn't be at school in the first place.
Band Geek: Dashboard Confessional like, rocks face! Almost as much as band! Band geeks rule--

Non-Band Geek: Can I hang out with you?

Band Geek: NO! You're not in band! We all have low self-esteem and are not very attractive, so we must exclude everyone to feel important and hot. So sorry...We rule, by the way. 'Cause we're in band. Yeah.
by Insei December 11, 2003