Do you know what to do if someone shouts that?
You do if you follow @OED, the official Twitter account of the Oxford English Dictionary. According to a tweet from last week, when you hear "Gardyloo," it's time to take cover.
Gardyloo: a warning cried before throwing dirty water into the street, from the pseudo-French phrase 'gare de l'eau' (beware of the water).— The OED (@OED) August 12, 2014
Weird words aren't all you'll learn from the Twitter handle. If you want to solve obscure etymological riddles, then you've come to the right place! For example:
#DidYouKnow that 'nacho' is said to derive from Ignacio, the name of the supposed inventor of the popular Mexican dish?— The OED (@OED) August 14, 2014
Or did you know that the word bidet has nothing to do with … that.
OED's Twitter account will also teach you fascinating, little-known facts about language history. Like this.
The earliest evidence in the OED for the word 'photo' comes from an 1860 letter by Queen Victoria.— The OED (@OED) August 7, 2014
#OnThisDay in 1809 Alfred Tennyson was born. He is the 27th most quoted source in the OED, for words including chirrup, javelin, & dabble.— The OED (@OED) August 6, 2014
And, importantly, this.
Granted, if you go around dropping all of this knowledge, some moon-blind quiddle might accuse you of being toploftical or hincty. But no matter. You can just say you're studying to be a cruciverbalist.
Cruciverbalist, n.: a person who compiles or solves crossword puzzles; a crossword enthusiast.— The OED (@OED) July 10, 2014
Or, you can own your nerdy obsession with language and simply proclaim yourself a wordmonger.
Wordmonger, n.: Originally: a person who deals in strange, pedantic, or empty words. Now also: a person skilled in the use of words.— The OED (@OED) May 28, 2014