Imam Cafer Sadık (a.s): Whistling has four expressions:
1-Fake news
2-Unpleasant bad word
3-Revealing the secret
4-Musibet.
İbn-i Sirin: Seeing yourself whistling even though you don't know how to whistle; It means letting people know your secret.
To see you whistling; It is a sign that you will lie to respectable people, swear under false oath to confirm this lie, and then your lie will be revealed. Moorish:Whistling; For men, it is a sign of disaster, for women, it is a sign that their secrets will be revealed and disgrace.