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When you grab a girl’s snatch, squeeze it like a cheeseburger, and blow through it like you're trying to blow out a candle. If it makes a loud squeaky noise, you act like you're Van Morrison playing her Hairy Harmonica. She can also play it by puckering her lips and letting out a loud queef.
My cousin tried to play the Hairy Harmonica at a party and it sounded like a dying goat.
I blew so hard on my girlfriend’s snatch, it looked like she was about to explode.
My brother’s Hairy Harmonica solo at the family reunion was so loud, the neighbors called the police.