Inspired by the movie “Rat Race”, this is used when someone is doing something they shouldn’t do.
Kyle: i’m making uncarbonated soda
Me: you can’t play hitler’s harmonica!
by harmonica March 30, 2021
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Harmonica joint

A certain of joint-rolling called a "flaming backflip" (you can look this up anywhere) cuts a hole along the paper, so you must inhale through the hole instead of through the roach. The result looks as though the smoker is playing a harmonica
try to roll a flaming backflip. it will probably turn into a harmonica joint. you tube the flaming backflip.
by lost1516 December 09, 2011
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Boston Harmonica

When two guys are docked together and a woman licks the two joined shafts like similar to playing the harmonica.
Me and John were hanging out when Sarah come over and we had a 3 way, she's always wanted to try a Boston harmonica.
by PhenicRaider February 24, 2023
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porcelain harmonica

An instrument played by using the toilet when all you have to give it is the air from your ass in different strengths to create a combination of high and low pitched notes.
After a long night of eating chimichangas, I had the pleasure of playing the porcelain harmonica and was able to play a version of Beethoven’s “Symphony No. 6” with the beautiful instrument.
by colintaylorful October 20, 2017
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Chi-Town Harmonica

The act of running your partner's erect penis back and forth along your tracheostomy hole while humming different notes as if playing a harmonica.
It sucks that she had to get a tracheotomy but she gave me a chi-town harmonica last night and it felt amazing!
by BrealBtown October 28, 2024
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playing a harmonica

Guy 1:Where were you?
Guy 2:Outside, playing a harmonica.
by undercoverbackdoorlover March 13, 2011
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harlem harmonica

While going down on a female, pinch her vaginal lips together and attempt to play them like a harmonica.
"My man was eating my pussy last night and decided to give me a Harlem harmonica. I slapped him so hard!"
by Rustyshacklefurd August 21, 2018
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