A retarded kind of hat worn by greasy highschoolers who wanna act like they're from the hood and adult degenerates who refused to grow up . If you want to look extra insufferable combine it with a neck tattoo.
That guy in the flatbill is unsurprisingly a degenerate
by BBY7 April 25, 2020
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n. - when a baseball hat is worn with an unbent bill. Often sported by wannabe thugs and douchebags who play the sport of baseball.
"I thought I saw K-Fed on campus today, but it was just a baseball player rockin' a flatbill."
by diegosoulmate December 17, 2008
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Flatbill- (v) the act of a man riding shotgun while his girlfriend drives.

Typically a person will adopt terrible posture while flatbilling. Persons flatbilling are often asleep or texting while their girlfriend pumps gas, loads the car with groceries or performs some otherwise useful task. The term comes from the flatbilled baseball-style hats common amongst habitual flatbillers.

Superficial reasons for flatbilling include the lack of a vehicle or a suspended drivers license. Flatbilling can also serve as a power play. In being disinterested and completely unhelpful, the male can manipulate a vulnerable female into a position of subservience. She becomes his chauffeur.

Neither self-respecting men nor self-respecting women will allow themselves to engage in regular flatbilling.
Girlfriend: It's alright, I'll drive.
Boyfriend: No way. I'm not flatbilling.
Girlfriend: But you've got the flu!
Boyfriend: Don't care. I can't be seen flatbilling.
by Flatbiller3000 November 12, 2011
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Originating from Humboldt CA the western flatbills douchebaggery has thoroughly spread thru the entire state. Typically found wearing a sport jersey with a flat bill hat which usually "reps" something. (Team, ideology or curse word) almost always driving a lifted truck with "hot" girlfriend in the passenger seat who clearly only puts up with their bullshit because he has money. Usually has a superiority complex; more than likely because of his tiny wiener. ALWAYS treats people like an asshole and only thinks about himself. It's basically a bro but on a whole another level of douche.
J: look at hot chick!
T: that ass!!
J: she's probably with flatbill...
by Btp2016 April 13, 2016
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Also called "BROs" because they constantly refer to each other as bro ("Hey bro"), a flatbiller is a kid covered in silly tattoes, tries his best to be x-treme, has a raised truck, rides dirtbikes and needs to talk about dirtbiking when other people are listening. Havasu and Glamis are the common vacation spots for west coast flatbillers. The term flatbiller refers to the flatbilled hats turned sideways that bros often wear. Common flatbiller accessories are custom lowered older cars, iron cross/west coast choppers stickers, bandanas, white stickers on the back window of their "street" truck that show how x-treme they are. Flatbillers are only allowed to wear black. There is an entire webpage devoted to providing flatbiller examples... the name is very creative, can you guess it?
Two flatbillers involved in an intelligent discourse at work-
Bro #1: Hey bro did you see my new west coast choppers tat, now I really look like eminem bro.
Bro #2: Bro, that tat is crazy, bro, you do look like eminem bro. We look so different than everyone else that is trying to look different.
Bro #1: Yeah bro, when I go dirtbiking I will have to let it air-out with the nipple ring. We are x-treme individuals bro. Nobody knows how to party like us. Did I mention that we dirtbike bro.
Bro #2: Awesome bro, these tattoes are never going out of style bro. They are timeless bro, like that "Limp Bizkit" scar that you scratched into your arm in 9th grade, bro.
Bro #1: Yeah bro. I need to get out of here bro, we should go to Havasu this weekend.
Bro #2: Yeah bro, but payday is next friday and I need to sink all my cash into the 8-ball shift-knob on the '63 bro.
Bro #1: I hear you bro, we need to ditch this job and become union pipelayers bro. That would be x-treme.
Customer: Can I have the large fries please.
by DwightB May 4, 2006
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A flatbiller is someone who buys a truck, puts a large and ineffectual lift on it, then proceeds to offroad in closed areas, resulting in more anti-offroader sentiment. Many times, but not always, they are characterized by their flat billed mesh hat.
That dude in the F150 lifted on 33's was at Gordons Well bombing through the bushes, he's too much of a flatbiller and is gonna help the Sierra Club close the dunes.
by Frothy Mug February 12, 2004
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A flatbiller is a young male, who usually lives in SoCal Or NorCal. They are typically white and very proud of their race(Not racist they're PROUD). They are very confident in themselves, they're also very outgoing and love to party. Their style includes Dickies pants or shorts, a shirt with a logo on it(SRH, Metal Mulisha, Skin, Famous, KMK), A hat or bandana(sometimes both) and many tattoos and piercings. You often see them riding lifted trucks, jeeps, dirt bikes, and quads.
That Flatbiller has some bomb tats.
by DanKii909 August 7, 2007
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