Slutdrop is the name of a dance move. The move involves squatting as quickly and as low as possible and immediately popping back up.
The origin of the move itself has been attributed to the music video for the song “Dirrty" by Christina Aguilera, released in 2002. The move has since gained popularity amongst pop singers, being performed by artists such as The Pussycat Dolls and Beyoncé.
Wikipedia knows what’s the deal.
SLUTDROP ON MY FACE XTINA