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A guy who will tell a girl anything to get them to hook up with them. A complete jerk who flirts with multiple girls at a time and makes them all believe they're individually special. They tell a girl they like them and act like they're in love so that they can get something out of it like pictures, hooking up, sex, etc. Someone who should not be trusted and is the reason for a lot of people's trust issues. Dont fuck with a fuckboi.
Friend 1: Yoo is Ashley still with James?
Friend 2: Nah didn't you hear? He told her he loved her and then asked another girl out.

Friend 1: What a fuckboi
by Iheardaboutyouuuuu May 28, 2015
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Feb 27 Word of the Day
From STEM, an abbreviation short for "Science, Technology, Engineering and Mathematics", a STEMlord is a pejorative term for a particular kind of person who has studied in these areas at university or works in these fields who holds a pretentious, condescending attitude to anyone who has studied in any other fields, particularly the Arts and Humanities. They typically believe themselves to be more "intelligent" and "rational", while generally remaining incredibly ignorant outside of their areas of expertise and having the charisma of a rotting pig's backside.
"Ugh, I wish Reddit wasn't full of STEMlords the entire goddamn time."
by nopeidontneedanameok October 15, 2015
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I thought he wanted to be exclusive but it turns out he was playing me. What a fuckboi.
by churnedbutter April 07, 2015
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A fuck boi is that one 15 year old boy you have on facebook who posts selfies of himself pouting with more than one filter applied over the picture and gets way more like than he deserves.

Typically fuck bois have gelled quiffs, think that it is acceptable for a boy to pout in photos and frequently post selfies with their 'six pack' in full display.

They have over 100 likes on their profile picture because they have 2,000 girls as friends facebook and simultaneously flirt with them all, have smoked weed twice yet own HUF socks and post pictures of their Nikes on instagram with the heart eyes emoji as the caption.

Fuck bois often think that they are cool for bragging about having sex or getting drunk.
"this fuck boi needs to stop writing soppy paragraphs on my facebook newsfeed, everyone knows he's only doing it to get into the pants of one of the 2,000 girls he's friends with"
by definepseudonym September 22, 2014
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You will find these strange creatures usually clogging up your local Nike store, Listening to either Pit Bull or Eminem on full volume in the back of the class during a test (usually via wireless Beats), or trying to act cool by inviting your sister to parties. Fuckbois are above and beyond the common douchebag. They are usually from the ages of 12 to 25, and can be found wearing any and all things Nike. They often were hated or outcasted in their early years of school because they were weird or bossy, and now, they want all the attention they can get. They post shirtless selfies of themselves making a "cool" or pouty face with an average of 3-5 instagram filters and tags such as #thuglife or #Swag. They own every Call of Duty that comes out, even if they only play it for about 5 minutes before letting it gather dust next to their Xbox One, which they have also only used to play minecraft and titanfall. Fuckbois are also bitchy and controlling. You will often see fuckbois wearing napkins or duct tape wrapped around their new Air Jordans so they don't get dirty. They will also commonly try to look cool by smoking Vapor Pens or Cigarettes (which they will only puff), and showing an obsession with Weed, even if they've only smoked it once or twice at the most.

To sum up a fuckboi, they are a mix of a Bitch, a Jock and a Wigger.
For a very good example of a Fuckboi, please visit any social media page created by Justin Beiber.
by Th3rd June 14, 2015
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Ghetto way of spelling "fuckboy". Ghetto slang for a bitch, prison slang for the guy who takes it up the ass. Does NOT mean a player that "braeks girls hearts ;-;". The phrase has been used for ages (especially by the Hip-Hop scene), so don't ask me why the fuck it's so popular right now.
Ex. 1: "Look at dem fuckbois tryna walk in our hood! Let's fuck em up!"

Ex. 2: Chris is Bubba's fuckboi because he knows that Bubba won't kick his ass if he let's him fuck it.
by thisplacesucksass February 24, 2015
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A guy who tries to get with everyone. A player. A guy who will lie to a girl to make them hook up with them or send pics. They think they are the shit when they aren't. A guy who will only date a girl for their body. A total ass. A guy that will make a girl cry and laugh, and a guy who lies when they said I love you
Hey turns out he was a Fuckboi
by Know it all January 24, 2015
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