Where does “pupsko” come from?

pupsko (Polish) comes from Polish pupa, from German Popo, from German Podex, from Latin pōdex, from Proto-Indo-European pesd- — to fart softly, pass gas, break wind.

Ancestry of “pupsko”, step by step

StepLanguageWordMeaning
1Polishpupabum, rear, buttocks
2GermanPopobottom, buttocks, bum
3GermanPodexposterior, behind
4Latinpōdexanus, rectum, fundament
5Proto-Indo-Europeanpesd-to fart softly, pass gas, break wind
Every word from Proto-Indo-European pesd-