Baîller comme une carpe = To yawn one’s head off.
Elle fait la carpe pâmée (fam.) = She turns up the whites of her eyes; She pretends to be ill; She looks like a dying duck in a thunderstorm.
[Also: Faire des yeux de merlan frit.]
Carré
Une partie carrée = A party composed of two ladies and two gentlemen.
C’est une tête carrée = He is an obstinate fellow.
Carreau
C’est un valet de carreau = He is a contemptible fellow, a snob.
Coucher sur le carreau = To sleep on the floor.