Pissrod
A baseball term, used when a batter hits a line drive so hard and straight that it looks like a pissrod. A pissrod is a boner (hard-on, chubby, stiffy, etc.) created by one needing to take a piss. Therefore, the straight trajectory of the ball looks like a boner, or a pissrod.
"I can't believe that pissrod was only a single."