Definition of no siree in English:

no siree

(also no sirree)

exclamation

North American
informal
  • ‘No indeed’; ‘certainly not’. Occasionally more fully "no siree bob", "no siree bub".

Origin

Mid 19th century; earliest use found in Quincy Whig (Illinois). From no [interjection] + siree, variant of sorry.

Pronunciation

no siree

/ˌnəʊ səˈriː/