From Wiktionary, the free dictionary
Literally, “the balls (eggs, testicles) do not teach the butt”.
- IPA(key): [ˈjæjt͡sə ˈzadʲnʲɪt͡sʊ nʲɪ‿ˈut͡ɕɪt]
я́йца за́дницу не у́чат • (jájca zádnicu ne účat)
- (vulgar) Synonym of я́йца ку́рицу не у́чат (jájca kúricu ne účat, “don't teach your grandmother to suck eggs”)
