nice-nelly

adjective

1. characterized by prudishness or excessive modesty: The entrance of his nice-nelly friend stopped the flow of risqué stories.
2. being a euphemism; euphemistic: nice-nelly expressions.

noun

1. a person who professes or exhibits excessive modesty, prudishness, or the like: too much of a nice nelly to have any fun.
2. nice-nellyism(def 2).