From the ArcaMax Publishing, Vocabulary Newsletter:
http://www.arcamax.com/news/vocabulary/s-565208-288434
milksop \MILK-sop\ (noun) - An effeminate or weak-minded person; an
unmanly man.
"And, if we set off soon, we can escape the milksop misses Mother has
invited for us." -- Julia Quinn, 'The Viscount Who Loved Me'
Milksop comes from Middle English, literally a piece of bread sopped
in milk.