Top Definition
a) an infamous massacre committed by Al Capone on St Valentine's Day 1929
b) when one breaks up with their significant other on St Valentine's Day
Do not commit a St Valentine's Day Massacre, definition b) , on your significant other.
by Sexydimma March 03, 2015
2 more definitions
Sex with a woman having her period.
When I was fucking her, she was having a st. valentine's day massacre. My "al capone" was all red.
by mr. buggaloo October 01, 2004
Have some girls get on their knees in a line. Proceed to take your pants off and bunny hop down the line, slapping the girls across the cheek with your cock.
Girls get down, I am about to perform the St. Valentine's Day Massacre
by studmuffin March 07, 2005

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