When a man gives a woman a rather painful blow to the face via his dick. Some recipients have reportedly expirienced brain damage/internal bruising due to the "Slap". Founded by the grand daddy of them all, Louis "The Punisher" Lombardy (Also known for his work on TV's 24).
Person 1: "Damn, i feel so sorry for her. She will be mentally impaired for the rest of her life due to that Lombardy Slap."

Person 2: "What?! I thought she had Down's Syndrome!"
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The act of smacking one's penis across another's face
The morning after heavy drinking, the horizontal red welt on his face was evidence that he received a Lombardi Slap after passing out.
by Pimpo June 10, 2004
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The act of hitting sombody in the face with a flaccid penis.
Jon was lombardi slapped by a jiggly elephant penis and it created a welt across his face.
by dickmonster69 August 27, 2011
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