Milquetoast
baby
big baby
chicken
doormat
dull tool
gutless wonder
invertebrate
jellyfish
lightweight
meek soul
milksop
mollycoddle
namby-pamby
nebbish
nonentity
pansy
pantywaist
pushover
sad sack
sissy
softling
softy
sop
weak sister
weakling
wuss
cry like a baby
Brillo
WIMP
bargainer
cardiologist
hailstorm
half-educated
half-wit
high-iq
kellysummer
muscle-bound
power-hungry
quitter
rheumatiz
riddance
schmuck
shirker
slumberer
sociopath
talentless
tautology
thebackseat
tusker
uper
waken
Achebe
maybe