MILKSOP

milk ‧ sop /ˈmɪlksɒp $ -sɑːp/ BrE AmE noun [countable] old-fashioned

[ Date: 1300-1400 ; Origin: milksop 'bread softened in milk' (14-15 centuries) ]

a boy or man who is too gentle and weak, and who is afraid to do anything difficult or dangerous