What is Marble Slab?
1.
a person who's skinny on the bottom and fat on the top
"omg that girl is such a marble slab"
See
2.
...when you shoot your load onto a chilled peice of marble, mix in your favorite toppings with ice cream, then serve in a cone.
Suggested Toppings:
Hey, you that chick Eva Longoria, right?
--yeah--
...well I just gave her a Marble Slab!
--nice--