Slutdrop is a dance move. The move involves squatting as quickly and as low as possible and immediately popping back up. A hand is often put straight up to steady oneself, and the move is often performed whilst grinding a dance partner that the dropper is trying to impress. The term is a compound word combining the words "slut" and "drop", reflecting the sexual nature of the move and the act of dropping one's body lower to the ground. The move's popularity is attributed to its usage by Christina Aguilera in her music video for "Dirrty" in 2002. Other pop stars who have performed the move include the Pussycat Dolls, Beyoncé and Britney Spears. As the move is essentially a type of squat exercise, doing it repeatedly is reported to lead to an increase in muscle strength in the thighs.