What exactly is a "fuckboy"?

I looked it up on urban dictionary and this was the top definition:"that ain't bout shit."
(look at that weak ass fuck boy.)

I'm still kinda confused tho... 😟

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+1 y
"A person who is a weak ass pussy that ain't bout shit."
(look at that weak ass fuck boy.)
What exactly is a "fuckboy"?
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