whistling, n.Definitions

Whistling is strangling air into melodic submission

Whistling is fancy breathing

Whistling is breathing in cursive.

Whistling is controlled mouth farting.

Whistling is talking bird.

Whistling is wind making a narrow escape.

Whistling is taboo because it is an archaic ways of calling to and attracting the attention of theriomorphic deities or deified animals.