One who is constantly subdued by his partner/wife/fiance to the point where he has no identity of his own, rather just a puppet that she speaks through.
"Geez.. his at home cuddling up to her again"
"Yeah, Sam's such a softcock"
man who cant get a hard on, therefore is a useless cunt, useless cunt therefore being a softcock, softcock can descibe someone who cant or wont do something whatever that might be
A half-baked nancy boy/girl who can't keep up with the rest of the crew but purports to be able to.
Susana said she'd go out on the weekend. When she realized she wouldn't be able to keep up, she decided to make other plans. Therefore, Susana is a softcock.