Flat up

When a bubbly liquid, like soda, goes flat

"I hate buying 2L bottles of coke, they always flat up quickly"

by philcagitz July 29, 2024

flat-backed

Describes someone so outrageously drunk they end up horizontal—usually on a couch, the floor, or wherever gravity decides they should be. Comes from the image of someone literally being on their back, flat as a pancake, because standing is no longer an option.

"Bro was so flat-backed last night, we had to roll him onto a yoga mat and hope for the best."

by Handle Not Found July 12, 2025

flat cap man

Flat cap man is Ville Valo, the singer of the Finnish band HIM. He is called Flat cap man for wearing his signature Flat cap.

You: “Wanna see a new picture of Flat cap man?”

Friend: “Oh nooo! Yes! And he can have a flat cap party with us!”

by joeyisnotstupid March 2, 2025

flat stanley

A flattened boy fluttering in the wind on a string being lead along

Russel Hantz is the greatest flat stanley of allllll time

by thenavneet January 4, 2018

Flat-Backing

To smugly turn and face the opposing direction of an intended audience while having a full fledged conversation usually when it is business critical

*Three People speaking in a triangular formation; one of them is turned with their back to the other two, while the two are in avid discussion*
Lizzy- "Dick, hey I'm trying to communicate a few critical things that need to happen by the end of your shift"
Dick- "Oh, is that what you call it." Hmph (back turned to Lizzy, facing Barnaby)
Barnaby- "Did it not occur to you: You're flat-backing your boss... dick"
Lizzy- "You are a dick, Dick"

by BMiller58 December 24, 2022

Flat

Being FLAT broke

Dang I can’t go to the store I’m flat right now

by Blackmigo954 September 5, 2021

flat

your mom, your sister, your paper, your sidewalk.

kyle: your sister is so flat bro. she looks like a piece of paper.
me: no u

by chileoragnes January 1, 2022