Meaning of nice nellyism in English:

nice nellyism

Pronunciation /ˌnʌɪs ˈnɛlɪɪz(ə)m/

noun

informal North American
  • Excessive prudishness of speech or behaviour; genteelism; an instance of this; a euphemism.

Origin

1930s; earliest use found in The Charleston Daily Mail. From Nice Nelly + -ism.