bone to pick

something to argue about, a matter to discuss

Joe sounded angry when he said, "I have a bone to pick with you."

bone to pick

A usually legitimate grievance against a particular person. The offending person either is unaware of the grievance or has been studiously avoiding acknowledging it - usually the latter - and will probably never acknowledge that this is a real, legitimate complaint.

I've got a bone to pick with you. You really violated my personal boundaries yesterday, and that wasn't cool.