"that kid is a lunchbox"
Q: "yo remember at lunch when that retarded kid started yelling and jumping up and down??"
A:"yea what a lunchbox!"
"Three bong hits of some KB will make me a complete lunch box."
Your local pothead gets called Lunchbox often. Newly evolved term Lunchbag is a person not even good enough for the Box!
That movie Inception was Lunchin