1. He unchivalrously ignored the pleas of the damsel in distress.
2. The knight behaved unchivalrously towards his opponent in the joust.
3. It was unchivalrously of him to leave his date alone at the party.
4. The soldier acted unchivalrously by abandoning his post during battle.
5. The prince unchivalrously refused to defend his kingdom against the invading army.
6. She was treated unchivalrously by her colleagues who belittled her accomplishments.
7. The knight unchivalrously insulted his lady fair in front of the entire court.
8. The nobleman unchivalrously cheated in the tournament to secure victory.
9. The warrior acted unchivalrously by stealing from his comrades.
10. It was unchivalrously of the king to betray his most loyal subjects.