"Hast bone to pick" is an old idiom that means someone is eager to argue or complain about something, often with a confrontational attitude. The most common antonyms for this expression would be phrases that denote a sense of calmness, agreement, and peace. For instance, "to extend an olive branch" means to make peace or reconciliation with someone. Alternatively, "to turn a blind eye" suggests an avoidance of conflict or the desire to ignore a problem. Other antonyms could include phrases like "to let it go," "to agree to disagree," or "to find common ground." Ultimately, any expression that implies a willingness to compromise rather than argue could be seen as an antonym to "hast bone to pick.