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Phonetic speaking of the letters SB, used to mean Shitbag. Spoken often in the presence of shitbags so that said shitbags do not realize that they are being called out.

Commonly used in the military, e.g. Navy, to refer to those who lack the ability to show any discipline, bearing, character, honor, care, or commitment to the fact that they themselves are a member of the Armed Forces.
1. That Sierra Bravo hasn't cared to iron his uniform since boot camp.

2. Our LPO is always pissed at this division because of all these Sierra Bravo's in it.

3. FN Kaine
by 7h0rn3 December 15, 2008
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