Put your big-girl panties on

Put your big-girl panties on is a sharp, colloquial rebuke Mo uses against Maggie when they argue about Cooper’s withdrawal from his family. Its force comes from the clash between an acknowledgment of Maggie’s hurt and Mo’s insistence that she stop letting that hurt shape her brother’s life.

Meaning and Form

The expression frames emotional endurance as a matter of personal responsibility: Maggie is told to put aside her grievance and get over it. The wording is deliberately undignified and taunting. “Big-girl” invokes adulthood while “panties” makes the demand sound belittling, turning what might be sober counsel into an insult delivered in anger.

The Confrontation with Maggie

Mo uses the phrase during a face-to-face quarrel after Maggie tells her she does not belong with the family and asks whether Cooper made promises, said he loved her, and disappointed her. Mo answers by accusing Maggie of contributing to Cooper’s isolation: he will not come home because he cannot face her, Mo says, and has cut himself off from everyone because he believes he cannot be trusted to love anyone. She then tells Maggie, “Well, put your big-girl panties on and get the hell over it.” The idiom is the climax of a longer accusation, not a general maxim detached from the scene.

Rhetorical Force and Dramatic Role

The phrase carries a pointed contradiction. Mo recognizes that Maggie has been disappointed by Cooper, but refuses to treat that pain as an excuse for what she sees as the harm Maggie has done to him. Her demand for maturity is itself delivered through a personal attack, so the line rebukes Maggie’s conduct while exposing Mo’s own anger. Maggie rejects Mo’s account, insisting that Mo does not understand what Cooper did to the family; she steps close enough to press her forehead against Mo’s, while Gracie tries to pull Mo back and Eli moves between them. The expression therefore marks the argument’s escalation: a call to get over the conflict helps make the conflict physical.