Je l’ai pris à court = I took him unawares.
Il se trouve à court (d’argent) = He is short of money.
Dites cela tout court = Say that and no more.
Il l’a appelé Jean tout court = He called him simply (or, just) John (without Mr. or surname).
Couteau
Ils sont à couteaux tirés = They are at daggers drawn.
[Formerly: Ils en sont aux couteaux tirés.]
Aller en Flandre sans couteau = To embark in an enterprise without the necessary resources.
[Also: Aller aux mûres sans crochet.]
C’est comme le couteau de Jeannot = That is like the Irishman’s gun (said of anything that has been mended so often as to have nothing of the original left).