(1) {n.}, {informal} Someone who acts too good to be true; a prude; a prig. * /We took him for a nice Nelly when he wouldn't fight./ (2) {adj.}, {informal} Too careful not to say or do anything wrong or improper; too proper; prudish. * /Her nice Nelly behavior made her unpopular at school./
NICE NELLY
Meaning of NICE NELLY in English
Slang English vocab. Английский сленговый словарь. 2012