look up any word, like usuratonkachi:
 
3.
synonym for vagina.
I made her get on all fours with her ass up in the air. I got behind her and proceeded to devour her glorious munchbox with furious voracity until her juices enabled me to penetrate her with my firm, hard cock. I then went knuckle-deep into her gargoyle and she came all over my glistening member, at which point I went balls to the hilt and sprayed my man-juice all over perfect ass and passed out from exhaustion. When I awoke from my slumber, I read a short story by Edgar Allen Poe contemplated the meaning of life. Sacre Bleu!
by Col. Turdburglar October 20, 2008
 
1.
To engage in cunnilingus (a play on the word "lunch box")
by Anonymous October 18, 2003
 
2.
1. A term used to lick the vagina of a girl.

2. A nick name used for a girl. Usually girls named Anne.

Carpet Muncher
1. "Hey there, Can I please lick your vagina? Okay, thanks."

Anne: "Hey Chris!"
Chris: "Munch Box!"
by David Logan February 13, 2008
 
4.
smoking large amounts of weed then opening the back trunk of your car and eating the mass amounts of food sitting there
munch box!
by dudewateva12 February 16, 2011