1. (often with negated predic) ( sth. happens) as if by its own effort: (all) by itself
on its own
( sth. will) take care of itself.
«Это ты перевез на дачу холодильник?» - «А кто же ещё? Не святым же духом он туда попал!» Was it you who moved the refrigerator to the dacha?" "Who else? It didn't get there by itself"
2. \Д-357 узнать что humor (to figure out or learn sth. ) from an unexpected or unusual source that one does not want to reveal
a little bird told one.
Большой русско-английский фразеологический словарь. — М.: ACT-ПРЕСС КНИГА. С.И. Лубенская. 2004.