A
au revoir
Goodbye, until we meet again
carte blanche
Full discretionary power
coup de grâce
A decisive finishing blow
avant-garde
Something new and different, experimental
carte blanche
A controversial issue that generates public debate; a celebrated case
coup d’état
Overthrow of a government by a group
bête noire
A person or thing especially dreaded
c’est la vie
That’s life!
déjà vu
Something overly familiar, literally, already seen
enfant terrible
‘Terrible child,” impetuous, embarrassing person