Last night after dinner the girls were doing their usual routine of running laps around the house screaming and laughing when they both stopped in the middle of the living room. Royce asked the girls what they were doing when each girl have her undies pulled down exposing each of their little bums. Rasa told him they were playing the booty shake.
Each girl would stand at either end of the living room, run backwards until they made contact with each other booty to booty, laugh and scream and then do it over again, and again, and again, and again.
Apparently that folks, is the booty shaker.