Definition of milquetoast in English:

milquetoast

noun

North american
  • A person who is timid or submissive.

    [as modifier] ‘a frail, milquetoast character’
    • ‘Enter Ray Rhodes, a highly regarded defensive troubleshooter with a knack for resurrecting Milquetoast units.’
    • ‘Alarms ring when Garvin speaks of applying to the Olympic Village design standards like those that produced the Milquetoast, nothing-ventured buildings at Battery Park City.’
    • ‘Charlie is the self-effacing, Milquetoast dude who allows people to walk all over him.’

Origin

1930s: from the name of a cartoon character, Caspar Milquetoast, created by H. T. Webster in 1924.

Pronunciation:

milquetoast

/ˈmɪlktəʊst/