The "plating of the lamb" is: the wrapping of both legs behind the head by a naked female causing the vaginal region, specifically the labias and clitoris, to protrude in an open display of various consistencies that often resembles a small lamb attempting to suckle.
The display or, "plating," is often met with the most enthusiastic response at fraternity parties, tailgates and in the hotel rooms of married, Republicanpoliticians.
I walked into the party to see Carrie plating the lamb. I wanted to vomit, but the guys seemed to love it.
"What are you doing in the bathroom, Kayla?"
"I'm going to the gynocologist tomorrow so I'm trimming my whiskers, or plating my hamburger."
"Omg why would you tell me that."
"It's going to look so presentable."