FAUX PAS • DICTIONARY ONE.COM • Definition of Faux pas

... be more complex than that at a symphony concert. This is a distinct advantage, for it gives you a splendid opportunity to catch some wretch applauding before the music is really finished. Nothing is quite comparable to the satisfaction of smiling knowingly at your neighbors when this faux pas is committed, unless it be the joy of being the first to applaud at the REAL conclusion. This latter course, however, is fraught with danger for the beginner; the chances for errors in judgment are many, and the only sure way to avoid anachronistic applause ...

— Perfect Behavior - A Guide for Ladies and Gentlemen in all Social Crises • Donald Ogden Stewart