1 definition by Rock Manwood

Top Definition
Ir·ish jack·ham·mer ahy-rish jak-ham-er (Verb)
The act of a man with a small penis pounding away mercilessly at a woman's vagina in attempt to get deeper.
(Noun) Small penis of any nationality.
I was having sex with this big girl. I had to give her the Irish jackhammer for her to even feel it!
by Rock Manwood November 10, 2011

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