To drop all pretense of politeness and have an acrimonious falling-out; to show no consideration for someone's feelings during a dispute.

To have an acrimonious falling-out or end a relationship; to shed all pretense of cordiality and show no consideration for someone's feelings.

to drop all pretenses of politeness and engage in an open conflict; to do something that causes both sides to lose face or dignity

To scratch one's face so that the skin is broken; often used when referring to babies scratching themselves.

To openly turn against someone; to bring a dispute into the open or no longer care about saving face