Used in aviation to refer to Cumulonimbus clouds. The letters CB being the meteorological symbol for Cumulonimbus, and in the ICAO (International Civil Aviation Organization) phonetic alphabet CB becomes Charlie Bravo.
The letter's "C" (Charlie) and "B" (Bravo) used as shorthand to describe a certain breed of woman known as a cunty bitch
A Charlie Bravo can often be recognized by the configuration of her lips where they are pursed in a manner that looks like she just sucked a lemon and by a unique quick "tsk" sound emitted from her lemon-sucking lips whenever she doesn't approve of something followed by the catch-all phrase of either "whatever" or "I'm so over it / you". Dismissive hand motions often follow these sounds.
I asked that chick in logistics out for coffee and she was totally a Charlie Bravo. She just said, "Whatever" and walked away.