1 definition by Sully Sullivan

Top Definition
the act of ejaculating inside the vagina or anus while shouting "LET'S GO RED SOX" and slapping the penis 1-2-123 on whichever surface one ejaculated inside, as if you were at a baseball game
So I brought home this girl last night, and i found out she was a Yankees fan, so when i finished, i gave her a Boston Creampie.
by Sully Sullivan November 15, 2010
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