SOURCE: Bernstein, Jüdische Sprichwörter und Redensarten.Said of a person with an over-philosophical mind, according to Philologos.
ער קלערט צי אַ פֿלױ האָט אַ פּופּיק.
Er klert tsi a floy hot a pupik.
He's meditating on whether a flea has a belly-button.
