When you take the fat friend out of the equation, so that your buddy is then advanced into "scoring position" with the hotter broad of the group. Essentially, being a wingman
but sticking along the lines of the baseball theme.
Jake wanted to make his move with this chick at the bar, but he couldn't get her alone. I was already blacked out so I told him that I would lay down the sacrifice bunt.
The act of getting to second base
by grabbing a boob or boobs. Called a stand up because it refers to the upward direction on the human anatomy.
Jake hit a stand up double on the dance floor with that girl at the bar last night.