WordWeb Online

1. (cooking) prepare or cook by mixing ingredients
   "cook up a strange mixture";
   - concoct
    
2. [informal] Concoct something artificial or untrue
   - fabricate, manufacture, make up, invent

Derived forms: cooks up, cooking up, cooked up

See also: cook [informal]

Type of: concoct, cook, dream up, fix [informal], hatch, hit on, make, prepare, ready, think of, think up