flapping 

The process of constructing a spliff.
Skinning up

Teacher: You seem to be rather busy with something that you don't want anyone else to see. Come on, if it is more interesting than what is on the board you must share it with the class.
Pupil: Chill mate, I'm just flapping and it aint even a king skin.

flapping by Herr Lip December 1, 2007

Flapping 

The act of masturbating with an uncircumcised penis.

Guy 1: Hey man where's Ethan at?

Guy 2: Dude he's totally in his bathroom flapping.

Flapping by RheulingKing September 14, 2016

Flapping 

Having regular contact with a potential mate, both via Whatsapp and in the physical world.

I’m flapping this cute kech

Flapping by Pollo Pazzo December 25, 2018

Flapping 

Flapping. The act of farting laughing and peeing at the same time.

I was standing in the yard flapping.

Flapping by Smackit2003 January 29, 2019

Flapping 

To bail on a plan. Usually with a pitiful excuse. If the person does this often enough, they become the queen of flaps.

Also can use Flap

Jed - "Sorry, I know I said I'd come but I have a cold."

Sam - "You're flapping then?"

Jed - "No I just dont feel well.

Sam - "Dont flap man! It will be more boring."

Amanda - "This is the 5th time you've done this now Jed. You're becoming the queen of flaps."

Jed- "Fine I'll go."

Flapping by Jbot74 May 28, 2020

Flapping 

An idiot who is incessantly flapping there jaw at you or in your ear possibly spit coming out of the idiots mouth.

Meaning: Could you stop flapping in my ear man why can't you just shut the fuck up!

Stop flapping in my ear man! step back! give me some fucking space and shut the fuck up.

Flapping by BillLaRocco September 13, 2023

Flapping their gums 

When someone is said to be “flapping their gums” it means that he or she talks a lot about topics he or she doesn't really understand or know about. It also means to say something but not really mean it.

Frank and Joe are always flapping their gums about what it's like to be street hustlers, when they have never even been out of the burbs.

Flapping their gums by girl sexy February 7, 2009