1. milk-and-water - Noun
2. milk-and-water - Adjective
(obsolete) A light bluish colour. [16th c.]
Something insipid or mawkish. [from 18th c.]
milk-and-water (comparative more milk-and-water, superlative most milk-and-water)
Insipid, wishy-washy, weak. [from 18th c.]