also: ハモニカ
noun
harmonica; mouth organ
Standard term for the musical instrument.
彼はハーモニカを吹くのが上手だ。
He is good at playing the harmonica.
Slang, vulgar; derived from the resemblance of the motion to playing a harmonica.
あの単語は俗語で、ハーモニカは女性器を舐める行為を指す。
That word is slang; ハーモニカ refers to the act of licking female genitals.
noun
hypodermic syringe
Slang; possibly from the visual similarity of a syringe to a small harmonica.
俗語でハーモニカは注射器を意味することもある。
In slang, ハーモニカ can also mean a syringe.