A term often used after having achieved blasting a target in the head of a targeted player in a First Person Shooter video game. If your a pompus ass and decide to use it out loud, you may choose to broadcast it through voice comm. software to your teammates. Or it can be sent to the other players in game through the typing of the keyboard keys and putting the letters on the computer machine monitor screen.
BOOM HEADSHOT, BOOM HEAD SHOT. I could dance all day, I could dance all day, try n' hit me, try n' hit me, come on! BOOM HEADSHOT YAAAAA!