esprit de corps /es-prē də kor/ noun

1. (Fr corps body) regard for the honour of the body to which one belongs
2. Loyalty of a member to the whole

esprit de l'escalier /də-les-kal-yā/ (or sometimes incorrectly d'escalier) noun

1. (Fr escalier staircase) thinking of an apt or witty retort after the opportunity of making it is past
2. The retort itself

esprit fort /for/ noun

(Fr fort strong) a freethinker