cook back

== English == === Etymology === From cook +‎ back, from the notion of cooking the drug back to its original purity/strength. === Pronunciation === Rhymes: -æk === Verb === cook back (third-person singular simple present cooks back, present participle cooking back, simple past and past participle cooked back) (transitive, drugs) To recook a drug (especially crack cocaine) in an aqueous solution (water) in order to isolate and concentrate the active ingredients, thereby increasing its potency.