Flatchumidity

The high percentage of humidity that exists in the buttocks region/trousers soon after flatulance has occurred.

I have a stain in my shorts from the flatchumidity.

by Fart Smeller2 July 2, 2011

Flat Chang

Crap cocaine, that leaves you mostly feeling flat. Even after snorting a crazyass amount.

Dude, This is the Flat chang ? ......No shit man!

by wickwargirl1 August 16, 2012

flat floppy

When you are running and your stomach flops against your legs

Look at stans flat floppy, it's revolting

by fart brain November 30, 2014

flat dogging

It's like having sex doggy style, but the girl is laying flat on her stomach.

Yo man I was just flat dogging my girl and my dick got in so deep!

by Flat_dogging July 3, 2016

flat dicker

One who always lies prone while playing multi player games to avoid being shot.

That flat dick'n sum bitch just shot me in my face. He's laying down by the trucks.

Everywhere you turn there's a flat dicker.

credit to ItchyKitten

by SEAWOLF tm January 22, 2017

flatasstrophy

The condition which causes the breakdown of the gluteus maximus muscle caused by age, poor genetics, or skipping leg day at the gym.

It’s apparent he isn’t doing squats in the gym because he has major flatasstrophy.

by DefNotRight January 17, 2018

Flat Curves

When a woman has shapely thighs but has a flat booty

Brooklyn has flat curves

by CaptainFabulous June 9, 2018