cook up

fe’l verb

1. (of food or chemical substances) To prepare by cooking or heating. Let me cook up some eggs and bacon before you go.
2. To manufacture; to invent (something, often a deceit or falsehood). He really cooked up a good one this time, something about an airline disaster.
3. To prepare a heroin dose by heating.
4. To manufacture a significant amount of illegal drugs (LSD, meth, etc.)