A man lacking courage and other qualities deemed manly.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "milksop" in a sentence
"Detmar is the sort of chap who would once have been described as a milksop; when Issie met him in 1988 he was 25, but so close to his mother he used to shop for her sanitary towels."
"But even the most foolish swaggerer of them could not call milksop a man who could outride, outleap, outfence, outhunt him; who could drive the four horses of his coach to London and back at such a pace and in such a manner as made purple-faced old stage-coach drivers shake their heads with glee, and who, in a wrestling-match, could break a man's back at a throw if he chose to be unmerciful."
"Suckling is a nickname applied to a helpless person; cf. Littlechild and "milksop," which still exists, though rare, in the forms Milsopp and Mellsop."