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.
(..) why not just shoot my buddy... take his job, give it to his sworn enemy... hike up gas prices, bomb a village, club a baby seal... hit the hash pipe and join the National Guard? I can be elected president. - You feel like you're alone, Will? - What? Do you have a soul mate? (..)1997 Good Will Hunting