expression, noun which may take the genitive case particle 'no'
lowborn; of humble birth
A fixed expression describing a person's low social origin. Often carries a negative or pitying nuance; used in literary or historical contexts.
He is of humble birth, but he made his way through hard work.
Compound of 卑しい (lowly, humble) and 生まれ (birth). The exact historical derivation is uncertain, but the phrase has been used in classical and literary Japanese to denote low social origin.