crapaud n : large toothed frog of South America and Central America resembling the bullfrog [syn: South American bullfrog, Leptodactylus pentadactylus]
Jean Crapaud is a jocose name given to a Frenchman. It is intended as a national personification of the French people as a whole in much the same sense as John Bull is to the English and Fulanito is to the Spanish. It is sometimes used as a literary device to refer to a typical Frenchman, usually in the form of Monsieur Jean Crapaud.
The word crapaud is French for a toad (rather than frog) and is a reference to the ancient heraldic device of the kings of France, consisting of "three toads erect, saltant." Hence the name means Johnny the Toad.