I'm really surprised that a lot of you don't know what that meant! I'm not gonna explain it because somebody already has and more will probably still come!!!
But this reminds me of a joke (This I used to hear in middle school in the mid-1980's)...
Q: What do they serve on the middle floors of the Statue of Liberty???
A: A box lunch!!!
It's a lame joke but I hope it helps!
Josh
"Your mom was over here earlier, and I humped her like a little bitch!" -Stan's Grandpa