Definition of mother's child in English:

mother's child

noun

rare
  • A person (with general application). Chiefly in "every mother's child".

Origin

Late 16th century; earliest use found in Thomas Nashe (d. c1601), writer. From the genitive of mother + child.

Pronunciation

mother's child

/ˌmʌðəz ˈtʃʌɪld/