We need to sit down and 'hash' things 'out'. [=talk about things; discuss the situation]
The detectives 'hashed out' their theories about who committed the murder.
They've spent quite a bit of time 'hashing over' the problem.
(..) – So say I return in about… .. five days time. – Five days ?! – With my Mr. Tuttle. And then my Mr. Tuttle and your Mr. Moguy can hash out the finer details between themselves. – I say splendid Doctor… Splendid. Gentlemen… may I propose a toast… (..)2012 Django Unchained