it refers to the sexual activity between a man and a woman however, with a rather rough and fiesty edge to it.
Man 1 says to his friend - "Mate, i'm going to boomsmack the sh!t out of that girl tonight"
by FernandoTorres__ November 17, 2008
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1. To burn; putting someone in check
2. When angry and swearing at someone
3. A sexual comment; to want to get frisky with someone
1.
Eric: "Hey baby, can I get your number?"
Ashley: "Ummmm no! Didn't you go out with my friend last night?"
Nick: "Ohhh Eric! You just got boomsmacked!"

2.
"I am sooo mad right now! I wanna boomsmack him!"

3.
"Damn girl! I wanna boomsmack that ass!"
by Geets1234 January 20, 2013
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