Bond
Faire faux bond = 1. To deceive. 2. To fail to keep an appointment.
Il ne va que par sauts et par bonds = He only works by fits and starts.
Tant de bond que de volée = By hook or by crook.
Bonheur
Au petit bonheur! = I will chance it!
Par bonheur = As luck would have it.
Bonhomme
Petit bonhomme vit encore = There’s life in the old dog yet.
[An expression derived from a game which consisted in lighting a large roll of paper and passing it round a circle of people, each one repeating these words. The roll would often appear to be out, when a vigorous swirl would fan it again into a flame.]