Flatting

Term to describe the voyeuyristic practice of watching couples have sex in public car parks, which pre-dated the term 'dogging'.

Source : veteran doggers in East Midlands, origin unknown

"Ehhh just been flatting some couple down at piss-corner in the bottoms until some idiot boy racer scared em off"

by bogsnorkeller January 31, 2023

Flatliner

When you’re fucking a diabetic so hard her insulin pump fails sending her into insulin shock only to be revived by cumming in her mouth.

Hey Tina. I hope your glucose levels are in check or else we might have a flatliner.

by Thetunacan99 February 9, 2023

Flassing

The act of ripping your asshole hairs out, then proceeding to floss your teeth with them.

Bungledash saw there was food in Frankfurts teeth so he decided to help him out by pulling his asshole hairs off so he could start flassing.

by DA Big curly July 20, 2024

Brain Flatlining

When you’re talking to someone and your brain goes poof

Hi my name is patrick and my brain flatlining can you repeat that

by Bold-Pear904 September 13, 2019

To Flatline

To kill someone

That guy was so rude I’d like to flatline him.

by Plondruchen December 18, 2023

Emotional Flatliner

Someone who shows no emotional response to anything, no matter how poignant or stirring. They’re either so repressed that nothing gets through their emotional firewall, or so disconnected from their feelings that even a child’s laugh, a heartfelt poem, a soulful song, or a breathtaking view leaves them completely unmoved. Picture a human equivalent of a flatline on an emotional EKG—zero reaction, just a blank stare.

"I played her my favorite song, the one that makes everyone cry, and she just shrugged—total Emotional Flatliner."

by Raquel de la Roche August 5, 2025