hash something ↔ out
From Longman Dictionary of Contemporary Englishhash something ↔ out phrasal verb American English informalDO BADLYto discuss something very thoroughly and carefully, especially until you reach an agreement The reorganization plan was hashed out September 16. → hash→ See Verb tableExamples from the Corpushash out• Kate sat down, hashed it out and handed it in with half an hour to spare.