Cook Meaning

(slang) One who manufactures certain illegal drugs, especially meth.

Example:   Police found two meth cooks working in the illicit lab.
Mel Bradshaw, Victim Impact
  By late October, the pressure on the Dark Arrows' ecstasy cook had eased. Other suppliers had moved in with product.
2011, Mackenzie Phillips, High on Arrival
  Owsley Stanley was a pioneer LSD cook, and the Purple Owsley pill from his now-defunct lab was Dad's prized possession, a rare, potent, druggie collector's item, the alleged inspiration for the Hendrix song “Purple Haze.”
A fish, the European striped wrasse.