swan dive

Noun

 * 1)  A forward dive performed with an arched back, the legs together, starting with arms outstretched when jumping, bringing them over the head when landing.
 * 2) A similar movement out of the water.
 * 3)  A sharp drop or steep decline.

Translations

 * French:
 * Spanish: salto de ángel
 * Swedish:, svalhopp