If something is your metier, it is the kind of work or activity you do well because it fits you — you have a feel for it, not only school training. A job is what you are paid to do; your metier is the line where you look at home. A teacher might say classroom work is her metier, meaning she is naturally good at it and she likes it. English took the word from French métier, a trade or craft, so it still sounds a little French and a little formal. You will meet it in writing and careful speech more than in the corridor. Younger people more often say “that’s my thing” or “that’s what I’m good at.” People sometimes stretch it to a hobby they are gifted at, not only paid work — though actually some careful speakers keep it for work.

本行、擅長的領域。偏書面；口語較常說「拿手」或「專長」。