When you have your female partner bent over on all fours and have 2/5ths of your tongue in her anus and 2 fingers in her vagina whilst simultaneously stimulating the clitoris reach-around style with the other hand
Monica glared deeply into the windows of my soul, desperately aching to be serenaded by the Czechoslovakian Harmonica
by The Kydd December 19, 2020
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when you sneeze while eating a girl out, and it makes a 'phhhbbrrrrtt' sound
I've got to take my allergy medication more regularly: I gave Angie a sad harmonica last night
by ChocolateyShatner February 1, 2017
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When a dick is too big to blow so you have to play it side to side
Omg, you wouldn't believe how big John was - I had to do it harmonica style last night!
by mayocheese April 4, 2015
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The vagina. Derived from the male counterpart, skin flute. The back and forth motion of the head while performing oral sexual stimulation onto the vagina conjures images of the coolest blues jazz players going to town on their harmonicas.
Joe: Hey John, do you play any instruments?

John: Only the skin harmonica.

Joe: Never heard of that, what does it sound like?

John: Moaning.
by Ronductor July 20, 2008
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When a man is receiving oral copulation and the person performing the action begins to suck along the side of his penis, very reminiscent of the way one would play the harmonica.
"Damn, Jessica gives one hell of a blowjob! She even teased my balls while giving me a Hollywood Harmonica!"
by Madman Bedswerver April 27, 2023
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a vagina, specifically referring to the vagina lips region (a.k.a. her meat sheets)
"I want to play her meat harmonica."
by shelc May 22, 2010
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Noun: A guy who always has a harmonica on him. Unlike guitar guy, he does not have the harmonica on him specifically to impress others. He has it on him as a security blanket, to practice wherever he wants, to busk for money, and sometimes to impress others.
“That harmonica guy chose a really annoying instrument”

“This harmonica guy wants to sit in, that cool?”

“HEY HARMONICA GUY! Can you play TIMBER?!”
by GabuhGabuh22 July 11, 2020
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