The phrase comes from Russian, where eto shtany literally means these are pants, and the clip circulates online in transliterated form as oouuuuuu eto shtany. No confirmed original source, character or recording year is widely documented, so it spreads mainly as a standalone reaction audio shared between soundboards and short videos. Its humour relies on treating trousers as a shocking discovery, which makes it reusable for fashion reveals, thrift finds and ironic product showcases where creators want instant, language-crossing exaggeration without explaining the joke beforehand.