A brown 

Anal intercourse , penile insertion into the rectum via the a anus with resultant ejaculation

my girlfriend is a very versatile , wild , three Input pork monster . She’s all smiles this week because next week is national “give your bitch a brown week”

A brown by Davedale July 18, 2019

A brown 

A absolute waste man who shags 6 year olds

Jesus Jerry don’t shag her shes 6 you’ll become a brown

A brown by Parallelogramshagger May 8, 2020

A Brown Ugly 

When you shart in someone's face, resulting in a spatter of poop freckles.

Yo, I totally busted a brown ugly on that girl!

A Brown Ugly by Timica June 25, 2008

A 'brown trouser moment' 

similar to 'shit a brick', when something so scary happens or when something makes you really nervous

the cops dog kept sniffing our bag in the airport, that was such a 'brown trouser moment'

A 'brown trouser moment' by Shadzame September 23, 2009

A brown handshake

Giving a person a hand job while they are taking a shit

Amanda gave matthew a brown handshake after he ate some bad chinese food.

A brown handshake by Dirty dan the stalking man December 15, 2011

A Brown Log 

A Big Terd or A Big Piece Of Shit

You ain't nothing but a Brown log Clocking all the time

A Brown Log by Richard Michael Richmond December 24, 2018

Drop a brown wallet 

To go to the toilet after eating at a very expensive and smart establishment.

ooh! that meal last night was so tasty but it wasn't cheap. I'm just off to drop a brown wallet.

Drop a brown wallet by mummazumbe November 14, 2014