nightingale feces

Japan has a facial treatment called Uguisu no fun (or “nightingale feces”), which was first used by geisha’s in the 17th century. The treatment is now used by celebrities including Victoria Beckham & Tom Cruise. – WTF Fun Facts

Source: https://www.dailymail.co.uk/femail/article-2641957/The-cringe-inducing-facial-The-good-news-beats-Botox-The-bad-news-birds-mess.html