A male who engages in sexual relationships with multiple women with no obligations or loyalties towards any of them. This usually leads to discourse in the relationship between the male and the women. The male is usually under then name of "Casey".
"Dude, I just banged Scarlett last night"
"CASEY DUDE, You're such a fuccboi, that's what, the fourth one this week?!"
by GeofftheChineseBusinessMan September 25, 2017
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A degenerate . Usually Caucasian with darker hair, with the occasional other races. Beware when around these creatures because they tend to have a superiority complex and roam in packs like stray dogs.

Usually wears a Ralph Lauren cap, or any bent brim cap for that matter, along with Japanese symbols imprinted long sleeved shirts (which they have generally no understanding to the meaning of it), knee length shorts, nikes with matching colored socks (usually solid white or black). Essentially following the modern Japanese theme.

They listen to trap, or anything with no lyrical sense like Yung Lean.

Kid (IQ -average): You think I should get a shirt like that? It looks pretty hip
Kid (IQ +average): If you ever decide to become one of them, warn me. I would wish not to affiliate with you, though.
That fuccboy is breaching new levels of abstract autism.
by _ski September 3, 2015
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Male version of a slut.

Thinks of his sexual experiences as great achievements in life.
Person 1:"I heard Vin got laid on Friday AND Saturday."
Person 2: "Oh yeah, Vin is such a fuccboi."
Person 1: "True that."
by local buddha April 12, 2016
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A nigga that do gay shit like dancing on musica.ly like its not gay even though it is, talking shit behind your back or being happy as fuck when people are mad or upset. PS typically they spend all their time talking, being on music.ly or having seven bitches in his lap even though he gay as fuck, and most of the time fuccbois be having dyed faids or short faids, or they pretend to be like normal niggas so it's hard to spot them but just check how long their on the phone and if they do gay dances and songs while you look at them with disgust on your face like a real nigga.
Fuccboi : watch me whip.... normal nigga: no nigga that's gay.
by No fuccbois allowed October 19, 2017
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Single men who share posts on Facebook that complain about "fuckboys" and are otherwise salty about their lack of ability to get laid.
"Hey man, did you see that post James shared on Facebook about girls always choosing fuckboys over nice guys?"

"Yeah I saw that. James is such a fuccboi"
by Dolus September 1, 2015
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"Omg, that guy asked me for nudes last week, he is such a fuccboi."
by tara_smith11 March 11, 2015
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"Omg, that guy asked me for nudes last week, he is such a fuccboi."
by tara_smith11 March 10, 2015
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