«اِلْقَرْعَهْ تِتْبَاهَى بْشَعْرْ بِنْتُ اخْتَهَا»

The saying mocks a person who takes pride in qualities that belong to someone else. A woman whose own hair is gone praises her niece's hair as if its beauty reflected on her; the niece simply stands for any female relative.

More broadly, it targets borrowed glory: claiming credit through family ties, friends, or connections when one personally lacks the very merit being celebrated. The humor lies in the obvious gap between the boast and the boaster.

Use it as a pointed jab at someone who brags about a relative's or associate's accomplishments to make up for lacking their own. Suited to informal or critical remarks; because the image rests on hair loss, take care not to seem to mock illness or appearance.