Au fur et à mesure = In proportion as.
Fureur
Cela fait fureur maintenant = That is quite the rage now; That is all the go now.
Fusil
Changer son fusil d’épaule = To change one’s opinion, profession, tactics.
[A more familiar expression is retourner sa veste = to be a turn-coat.]
G.
Gaffe
Faire une gaffe = To put one’s foot in it; To make a stupid blunder.