Green’s Dictionary of Slang

(drugs) a large quantity, e.g., one kilo, of cocaine.

1994		UGK ‘Feds in Town’ 🎵 I [...] reorganize my click / Got the birds, and reopen my lab back up.
1996		UGK ‘Ridin’ Dirty’ 🎵 Keep my paper sturdy, big birds and tight herbs.
2002		Urban Dict. 🌐 bird. Brick of drugs, usually cocaine.
2014		T.I. ‘G’Shit’ 🎵 I got a bag full of birds and motherfuckers gettin' bought / Bars on the trap doors got it looking like a vault.
2020		Woods & Soderburg I Got a Monster 129: He’d misunderstood the code. The Orioles are the ‘O’s or ‘the birds,’ and a bird is a kilo.