Top Definition
Sem-i-roni: a) The penis in the state of not erect, yet not flacid. b)in between a boner and a limp wang.
1. My meat was semironi until she licked my balls.
2. Talking to his mom, I was semironi.
3. I got so hammered, I only was able to achieve semironi with Britney.
by Matt Baird December 19, 2007
5 Words related to semironi

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