Green’s Dictionary of Slang

’rex n.

(UK Black/drugs) a Pyrex mixing bowl, as used in mixing powdered cocaine and baking soda to make crack.

1011 Next Up?‘’ 🎵 I put sniff in a rex, and I slang that bobby.
1011 ‘With Intent’ 🎵 I ain’t even put the fork in the ’rex and it started locking already.