The term given to the "dance" move that Pete Wentz of Fall Out Boy performs in his band's video for their song "Dance, Dance". This movie is commonly recognised as it looks like Pete is having a seizure and/or humping the bass. The name is henceforth given because it is freaky, and because Pete resembles a camel.

the whale tail is the shape formed when a g-string rides up high over a womans trousers