A wolf whistle is a loud, high-pitched whistle produced by a person by placing two fingers in their mouth and blowing air through them. It is often used to get someone’s attention, particularly in a flirtatious or playful way.
To do a wolf whistle, first, make a small “O” shape with your lips. Then, place your index and middle fingers in your mouth, just below your bottom lip. Blow air through your fingers while keeping your lips relaxed. You may need to experiment with the position of your fingers and the amount of air you blow to get the desired sound.