flat6 

Horizontally opposed 6 cylinder engine also known as a "boxer"

A high tech design capable of producing awesome ammounts of power but not commonly used due to the engineering costs involved in designing them.

Commonly found in Porsches, and the reason why they are such a kick ass car

Flat6's are the best sounding engine

flat6 by flat6 April 17, 2005

Flathair 

Derogatory word for overly pretentious, non-self-aware germans on the internet. Originating from the description of young and sheltered, usually upper-middle-class german women acting in a naive all-knowing manner berating others while acting in ways usually mocked by the general public, and their usually purposefully very flat laying hairstyle. Has since expanded to a catch-all term including all behavior of specifically ethnic germans that are mocked upon in the general environment of the internet, but which are common in niche german-speaking communities, usually immediately identifying germans acting as if they are not a german in a more international community and the misinformation they have been spreading in their know-it-all-manner alongside it as part of that. Often ends with insults directed to those calling them out, often featuring more openly hostile displays of extremely racist and generally right-wing nationalist tendencies in direct contrast with their supposedly progressive, worldly persona.

While the literal german translation of "Flachhaar" has seen some adoption in german communities, which often make a big deal of translating every single piece of foreign vocabulary even if it is already widely adopted in regular conversation, the sheer existence of people and words not honoring the perceived superiority of humble Germany is still met with a higher than usual level of hostility, and usually world-shattering for those very sheltered individuals.

Of course it was a flathair all along, don't you have anything better to do than to insult and berate us about our own customs?

Flathair by Jason_Straker December 18, 2021

Flat as Kansas

a woman with small breasts "mosquito bites" could be considered as flat as the state of Kansas

Lynn is as flat as Kansas

Flat as Kansas by Sharon Jane MartinWeaverBr0wn May 18, 2023

flat clicker 

it’s a 2D plane that glows
it’s a motion stabilisation plateau

you put a laser on it but it doesn’t come with a laser
a.k.a. a mouse pad

Customer: I'm looking for a flat clicker
Worker: I'm not sure of what that is
Customer near yelling: A FLAT CLICKER!!!!

flat clicker by his_mum August 8, 2019

Flat Earther 

One who lacks the most important organ, a brain. One who believes that the Earth is Flat, and that space doesn't exist and is just a 'dome' around the Earth and everything is a lie told by the government.

Guy 1: How do u feel about Flat Earthers?

Guy 2: I feel that all Flat Earthers should be sent up in a rocket, and ejected into space, so their last sight will be a Spherical Earth in Space.

Flat Earther by Sur7 January 25, 2019

Flat Earther 

One who is mentally retarded in the head, was dropped as a child and snorts crushed up panadol.

All flat earthers are dickheads.

Flat Earther by FrogBoot May 5, 2018

flat stick 

flat out, busy, unable to stop, lots on your plate. the busiest of the busy and too busy to stop and do the little things.

Bob: "Dude, did you get that email?"
Jon: "Nah bro, I'm flat stick!"

flat stick by Vi3tnow April 4, 2009