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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terms used in the military to decribe a plan or team or location specified before a mission instead of ABC they say alpha bravo charlie delta ect. to prevent a mishearing of a plan
"move to alpha bravo charlie delta"
second soldier moves to specified locations
by will ferell April 10, 2014
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a group of friends who drink themselves to death several days a week and pass out after a large consumption. Additionally they eat a shit load of Taco Bell and yell FIRETEAM WHISKEY DICK BRAVO at random passerbys, especially if that passerby happens to be dressed up like Superman, just to laugh at the reaction. Every member has a nickname and a quote that describes who they are. They think they are awesome because they belong to this group, but in reality it only defines them worse off than they would be without the group in the first place. Although this may be true, FTWDB is the coolest shit ever invented and like a gang, there is no way out except for Hari Kari...FTWDB for life!!!!
by Captain Passout November 4, 2009
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Bravo India Tango Charlie Hotel is the Alphabetic Letters of NATO that spells the word "BITCH"
So the C.O comes in and calls me a Bravo India Tango Charlie Hotel , but i couldent say anything but yes sir.
by GSA84 May 25, 2020
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Realizing that all frats are weak and soft, an elite group of individuals specializing in the consumption of alcohol, formed a unique rival faction. Far superior to typical greek social houses, AGB incorporates bad-ass armed forces influences (hence bravo in the namesake) to cement the fact they are better than their "frat-tastic" counterparts. Ironically, it is sometimes observed that the behavior of this exclusive group is frighteningly close to that of a typical fratboy. This is attributed to the fact that AGB members command a vastly superior intellect and are openly mocking these lesser mortals for their outrageous dress and inferior manhood. Members can be identified by their rugged good-looks, their overall BAMF-ness, and the occasional AGB forearm bump.
He must be in AGB, look how many hotties are hanging on him.

AGB (ALPHA GAMMA BRAVO)! AGB! YEAH MOFOS!
BOOMTOWN!!!
by The Original Godfather November 18, 2010
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