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Bravo and Sierra are two of the military's words used to prevent misunderstandings in radio transmission. They stand for the letters B and S in the same way that Alpha means A and X-Ray means X.

Using "I call bravo sierra" is a more articulate and less crude way of saying "I call bullshit". It also can be a coded way of letting your friends know what you think while keeping the clueless out of the circle.

The phrase has been popularized by the XM Satellite radio team of Opie & Anthony.
Herbert: "I graduated Princeton with a 4.0 cumulative average."
Jimmy: "Did ya? I call bravo sierra."
by Chris Zizzo October 14, 2006
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Aug 7 Word of the Day
A celebrity free pass is an agreement between you and your significant other that if you meet said celebrity and there is an opportunity to sleep with them, your partner cannot get mad at you for doing so because you had agreed before hand that this person was your celebrity free pass. It is ideal if both of you in the relationship choose a celebrity free pass so that the playing field is even.
Julia met Drake at a bar, and hooked up with him, knowing that her significant other could not be mad at her, because Drake was her celebrity free pass.
by gingerale011 March 25, 2011
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