Mat (Russian: мат, матерщи́на, ма́терный язы́к) is a Russian patois language, base on the use of specific generally unprintable obscene words. Russian mat makes it possible to have a conversation (although not always insulting, but always emotional) using only obscene words, which is what sets Russian mat apart from the obsceneties of most languages. Mat's development is largely attributed to the Russian criminal underworld. Use of Russian mat in a public place constitutes a form of disorderly conduct, punishable under article 20.1.1 of the Offences Code of Russia.