Mérite
Remplir son mérite = To act up to one’s reputation.
Merle
*On ne prend pas les vieux merles à la pipée = Old birds are not to be caught with chaff.
Merveille
Il se porte à merveille = He is in splendid health.
Messe
*Près du moûtier, à messe le dernier = The nearer the church, the farther from God.
Métier
Il nous a servi un plat de son métier (or, de sa façon) = He played us one of his tricks.