Definition of phoney baloney in US English:

phoney baloney

noun

US
slang
  • Nonsense, humbug; something fraudulent or fake.

adjective

US
slang
  • Insincere; fake.

Origin

1930s. From phoney + baloney [interjection]. Compare slightly earlier phonus-bolonus and discussion at that entry.

Pronunciation

phoney baloney

/ˌfəʊni bəˈləʊni/