Mat (profanity)

The mat-word "хуй" ("khuy") in Max Vasmer's Russisches etymologisches Wörterbuch [ru] (Etymological Dictionary of the Russian Language). Heidelberg, 1950–1958

Mat (Russian: мат; матерщи́на / ма́терный язы́к, matershchina / materny yazyk) is the term for vulgar, obscene, or profane language in Russian and some other Slavic language communities.