in-the-park homerun  

Hitting all the bases and scoring on your first try.

Eric: I planned on getting to second base, but instead, I made an in-the-park homerun last night!

Parker: Fuckin' sweet bro!

in-the-park homerun by Errk XTC October 31, 2008

in the park home run

When a guy is really quick in bed
or
When you should only be getting to third base, but based on your skill, luck or some mistake, you get laid.

Girl: Wow, 5 seconds. Is that it?
Boy: Yeah, in the park home run. Sorry.
or
Wow, I totally wasn't expecting to get laid.

in the park home run by jc baby1 March 27, 2009