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2.
Extra innings means anal sex in accordance to the home run euphemism (where first base is kissing, second base is petting, third base is oral sex, and intercourse is a home run).
"Dude, I didn't even think I was going to get to first base with Carla, but we ended up going into extra innings!"
by Gene Wonka May 04, 2007
 
1.
Extra innings means anal sex in accordance to the home run euphemism (where first base is kissing, second base is petting, third base is oral sex, and intercourse is a home run).
"Dude, I didn't even think I was going to get to first base with Carla, but we ended up going into extra innings!"
by GeneWonka April 22, 2007
 
3.
After the first initial poop when you pull up your pants and walk out of the bathroom and then you have to poop again.
Damn that shit felt great but now I think I have some extra innings coming on.
by steelrunner December 11, 2009