Locking (originally Campbellocking) is a style of funk dance, which is today also associated with hip hop. The name is based on the concept of locking movements, which basically means freezing from a fast movement and "locking" in a certain position, holding that position for a short while and then continuing in the same speed as before. It relies on fast and distinct arm and hand movements combined with more relaxed hips and legs. The movements are generally large and exaggerated, and often very rhythmic and tightly synced with the music.
Popping is a street dance and one of the original funk styles that came from California during the late 1960s–1970s. The dance, first seen in the 1968 movie "Chitty Chitty Bang Bang" during a scene where actress and singer Sally Anne Howes acts as a music box doll, is based on the technique of quickly contracting and relaxing muscles to cause a jerk in the dancer's body, referred to as a pop or a hit. This is done continuously to the rhythm of a song in combination with various movements and poses.