Definition of amateur night in English:

amateur night

noun

US
  • An evening set aside at a musical or theatrical venue for amateur performers; a talent show. Also in extended use: a period characterized by a lack of professionalism; an example of amateurishness or ineptitude.

adjective

US
  • Resembling or characteristic of an amateur night; inept, shambolic, amateurish.

phrase

informal
  • Informalamateur night in Dixie: used as the type of amateurishness or ineptitude.

Origin

Mid 19th century. From amateur + night.

Pronunciation

amateur night

/ˈamət(ʃ)ə ˌnʌɪt/