Lily-white Definition

lĭlē-wīt, -hwīt
adjective
White as a lily.
Webster's New World
Innocent and pure; unsullied.
Webster's New World
Beyond reproach; blameless.
A man with a lily-white record.
American Heritage
Made up entirely or predominantly of white people.
Webster's New World

(slang) Restricted to Caucasians; pejorative in describing a white person, as are white-bread and paleface.

Wiktionary
Synonyms: