Occurs during sexual intercourse, when the male's penis is at its apex of stiffness, length and girth and as far as it can go into the
female's vagina, the male then sticks his finger into the
female's
asshole. Hence, The Half Slab, Combo Chicken Breast.
Male - Whispers in the
female's ear "That's the Full Slab" And sticks his finger into her
asshole.
Female - Replies in reaction to the gesture. "No, that's the Half Slab, Combo Chicken Breast."