A Fuckboy is the type of guy who does shit that generally pisses the population of the earth off all the time. He will also lead girls on just for hookups, says hes really into you but doesn't want to deal with all the "relationship bullshit" just to fuck you. He thinks about himself and only himself all the time but pretends to be really nice. He also does really fucked up shit and then complains about people who do the same old shit as him. once a fuckboy always a fuckboy, because fuck boys ganna be fuckboys.
a fuck boy can be anybody that pisses you off, example "me: dude that kid really just punch a whole in your wall for no reason?
friend: yea told the kid the party was over but he wouldn't listen and punched the wall.
me: what a fucking fuckboy."