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.
About this sound
Russian voice clip shouting ooooh these are pants with exaggerated excitement, used as a funny reaction sound effect for surprising clothing reveals
A drawn-out Russian voice clip that stretches a long, wobbly oooh before suddenly shouting eto shtany, which means these are pants. The delivery is wildly overexcited for such an ordinary discovery, with the pitch rising and the final words punched out like a big reveal. That mismatch between the huge reaction and the mundane object is what makes it funny. Listeners do not need to understand Russian to get the joke, because the tone alone sells surprise, triumph and total disbelief at a simple pair of trousers.