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1. In Baseball or Softball, to achieve a home run by hitting the ball so hard that not even the player who stayed home with his sick kids could catch it.

2. A single hit that is so vicious that its effects are felt for a while afterwards, usually through flying backwards, falling to the ground, writhing in pain, and throwing up. Bonus points if you do it with a baseball bat.
Aaron tried to sneak up on me while I was blindfolded, but I kicked him in the groin, which caused him to be knocked out of the park.
by El Singario February 10, 2006
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