WC sign

It is the public-toilet sign, the letters WC in a square. WC abbreviates “water closet”, the term coined in Britain in the 1700s for a small room with a flushing toilet, as opposed to the outdoor privy. The emoji draws the sign itself, usually white letters on a blue or dark square, like the real plaque on a toilet door.

The letters outlived the phrase. Almost nobody says “water closet” today, but WC became the standard toilet sign across continental Europe and much of Asia and the Middle East, and in many languages it is simply the everyday word: Dutch and German speakers say “WC”, Finnish “vessa” grew out of it, and Italian calls the bowl itself a “water”. In the United States, where signs say “restroom”, the letters are rare and some people have to look them up, which is one reason this page exists. British readers know WC from forms and older buildings but usually say “loo” or “toilet”.

The emoji came from the original Japanese mobile emoji sets, which included a whole run of station and airport signs: this one, 🚻 restroom, 🚹 men, 🚺 women, 🚼 baby care. That is why it sits among transport signs rather than household objects.

What does it mean when someone sends 🚾?

They are talking about a toilet, usually their own urgent need for one. Alone or with a running figure it means “gotta go, back shortly”. With a question mark it asks where the toilets are, handy across a language barrier because the sign is understood on several continents. In travel chats and reviews it flags that a place has (or lacks) a toilet. It carries no hidden meaning and no rudeness, just a slightly blunt honesty about why you are stepping away.