Milquetoast
Concise Oxford English Dictionary © 2008 Oxford University Press:
Milquetoast /ˈmɪlktəʊst/
▶noun chiefly N. Amer. a person who is timid or submissive.
– origin 1930s: from the name of a cartoon character, Caspar Milquetoast, created by H. T. Webster in 1924.
'Milquetoast' also found in these Oxford entries:

