Someone known to carry around a bookbag full of food (usually snacks) incase they get hungry ([munchies]) in their adventures
or
The bookbag said person carries.
> 'Hey Kitchin, what you got today mane?'
> 'What's in the kitchin today?'
> 'Damn girl you got the munchies don't you? Go talk to Kitchin, he got you something.'