Meaning of nice-nellyism

nice-nel•ly•ism

Pronunciation: (nīs'nel'ē-iz"um), [key]
— n.
  1. excessive modesty; prudishness.
  2. a euphemism: an evasive style of writing, full of circumlocutions and nice-nellyisms.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.