Jerking off in a public restroom stall while doing a handstand. The ejaculation must take place in less than 15 seconds after the jerking commences, and to truly perform this dead the load must be caught in the mouth of the one jerking off.
Dude I passed this girl walking through the mall yesterday. I got so hard I had to go into sprint to the restroom and pull an underhanded fastball.
by loisting4life April 10, 2017
When playing the game "Cup Hawk" you yell "Fastball Slammer" then throw the ball as hard as you can at the cup. Usually ends with drilling the guy standing behind the cup.
Aaron - "You know what, FASTBALL SLAMMER!"
Coleman - "Wow dude ok.. that hurt what the heck"
Aaron - "YOLO"
Coleman - "Wow dude ok.. that hurt what the heck"
Aaron - "YOLO"
by CupChamp March 11, 2012