What is cin cin?

"Cin cin" is an Italian expression often used as a toast, similar to saying "cheers" in English. It is typically used when clinking glasses during a celebration or social gathering. The phrase is believed to have originated from the sound of glasses clinking together or, according to some sources, may have roots in the Chinese phrase "qǐng qǐng" (请请), meaning "please please" or "welcome welcome," which was adopted by Europeans during the era of trade with China. The phrase has since become a common and cheerful part of Italian and broader European drinking culture.