faux pas

noun
\ ˈfō-ˌpä How to pronounce faux pas (audio) , fō-ˈpä\
plural faux pas\ ˈfō-​ˌpä(z) How to pronounce faux pas (audio) , fō-​ˈpä(z) \

Definition of faux pas

: a significant or embarrassing error or mistake : blunder Long, hot soaks in winter are a classic faux pas, since exposure to extreme heat after having been in the cold can cause small visible blood vessels to appear at the skin's surface.Elle especially : a socially awkward or improper act or remark Audiences must be supportive and enthusiastic—lots of clapping, no heckling. (And talking on cellphones during the performance is a huge faux pas). — Claudine Ise … when I sauntered into the main dining room for my first breakfast, I realized I was the only person showing his legs. Careless faux pas, or was I being overly sensitive to the local culture? — David Swanson Campaigning last year seemed to convince her that she can venture out alone without making costly faux pas. Time Magazine It was not until I'd covered about fifty kilometers that I committed my most terrible social faux pas yet: I overtook another cyclist. — Polly Evans