To Kick Your Cunt In or Have Your Cunt Kicked In is the act of being severely beaten up, It is a mostly scottish term and is widely used by chavs or neds as a form of greeting if they have taken exception to your presence.
At first glance, it may seem like your standardMunchie Box, however, consuming such a box gives the owner extreme anger issues and a primal urge to protect the box and it's contents, no matter the cost.
Consumer: "Oh yes, my box, my precious."
Scrounger: "Here mate, whit kind eh box is that?"
Consumer: "It's a kick yer cunt in box if ye keep looking at it!"