the sexual act of having forceful, unprotected sex with a partner, ejaculating inside them, then killing them. This act is illegal in all 50 states and is highly frowned upon elsewhere. The act is obviously named after the event where 5 Bostonians were killed by the British in 1770.
Guy1: dude I have to get out of here quickly.

Guy2: Why man?

Guy1: I just gave this girl a boston massacre and the cops are after me.
by dirtyman2010 July 14, 2009
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1.the hilarious killing of only a few idiots
2.Immense propaganda by Paul Revere
3. The Mets/ Red Sox World Series
by a55h01e November 12, 2004
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Overly publicized snowball fight in colonial America where a kid made fun of the Brits.
Did you know in the Boston Massacre only like 4 people were killed?
by Harman P. Kardon October 16, 2008
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