Snickers. It's a double entendre. In a non-sexual way.
I'm geeking out a little about the billboard I just saw near my house.
Generally speaking, I have mixed feelings about Snickers' contention that it is some sort of hunger-stopping mini-meal (as opposed to a candy bar, which I believe it to be), but you've got to love an ad campaign as simple as this one. There are currently 10 or 20 strange, nut-, caramel-, or hunger-related slogans ("Snacklish") are floating around Chicago on taxis or peering out from train station walls, but none of them compares to this one. God bless the super-nerd ad man who came up with this one, and God bless Mr. Mars and his many candy bars.