The phrase comes from Russian playground slang, where puk is the childish word for a fart and kakashechki is a cute diminutive for poop. Clips using this kind of baby talk spread on Russian social media and soundboards as short gross out memes, often remixed alongside a fart with reverb or a long brain fart for extra silliness. English speaking creators later adopted the sound without translation because the rhythm and tone are funny on their own, and it now appears in prank edits and toilet humor compilations.