The act of hiding an M&M, Reese's Piece, Skittle, or other small candy in one's belly button with the intent of saving it for consumption at a later time.
Whoa... Dude, when I was cleaning out my belly button and looking for lint, I found a Snack Stash! Yes! And it's a grape Skittle too!
de Offroadcamry 26 février 2010