In the hood people use the 'brid clap' to create a signal that the cops are about, as the birds (normally pigeons) fly into the air and make a clicking noise. This indication gives people time to stop doing illegal activities, and if they're dealing they can go hide their product and/or money.
This can be seen in Training Day starring Denzel Washington, and even on hip-hop videos such as The Game's "Hate It or Love It" video.
"Aiyyo, you see the pigs man... do a bird clap so I don't get knocked."
Guy 1: "Five-0! Five-0 just entered the block man!"
Guy 2: *starts to bird clap* "brrr-brrr-brrrbr"
Guy 3: "Oh shit, I gotta bounce! I ain't gettin' sent down today!"
Cops: "What the fuck are the birds doing?"
1) More elbows
2) innovative new genre defined by, but not constrained to: rhythmic elbow gyrations, prohibition-era samples, and copious amounts of awesome.
A captain of birds; most specifically related to the tit, booby, the rough shag, and the cock. Additionally, the captain of birds will utter the most diabolical (bird related) of words when in pure ecstasy, such as Pyrrhuloxia; a name closely associated with wookies, and your mother.