From the character Caspar Milquetoast of the comic strip The Timid Soul, created by Harold Webster and first published in 1924 (named after the American dish milk toast).
milquetoast (comparative more milquetoast, superlative most milquetoast)
- Meek, timid.
milquetoast (plural milquetoasts)
- (pejorative) A person of meek or timid disposition.