Definition of old-mannish in US English:

old-mannish

adjective

  • Suggestive of or resembling an old man.

Origin

Mid 19th century; earliest use found in John Addington Symonds (1840–1893), writer and advocate of sexual reform. From old man + -ish.

Pronunciation

old-mannish

/ˌəʊl(d)ˈmanɪʃ/