Where does “trzęsidupka” come from?

trzęsidupka (Polish) comes from Polish dupa, from Proto-Slavic *dupa.

Ancestry of “trzęsidupka”, step by step

trzęsidupka traces back through two separate lines of ancestry.

via Polish dupa

StepLanguageWordMeaning
1Polishdupaass, arse; sexually attractive woman; hollow,...
2Proto-Slavic*dupa—

via Polish trząść

StepLanguageWordMeaning
1Polishtrząśćto shake; to shiver, to tremble, to quake, to...
2Proto-Slavictręstìto shake
Every word from Proto-Slavic *dupa →Every word from Polish dupa →