Top Definition
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"
by CupChamp March 11, 2012
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