Found this on urban dictionary - "Similar to a fuckboy but without the cocky attitude. The Softboy will butter a girl up by appealing to her emotions and showing a "sensitive" side long enough for her to sleep with him, whether or not he actually cares about her or not. Then, like the fuckboy, he can't/won't commit. Differs from the fuckboy because he goes for the heart and emotions rather than just the body"
@datcookietho That's the original definition of softboy, although like fuckboy, the meaning kinda changed over time. Fuckboy was originally a compliment. It meant a boy who you were always fucking aroud with, like your friend. But it adopted the new meaning of like a male who is always trying to get laid, similar to the female counterpart of slut or hoe, and with a strongly negative connotation. A fuckboy is usually whiny, insecure, and self-important.