Backing your fist 

(Vulgar) Jamaican slang
Refers to the act of pulling the penis back and forth with the hand in the shape of a fist, usually till ejaculation occurs.

To masturbate or jerk off

Everyday, a big man like you just stays at your yard, backing your fist. Waste man style that, dawg!

Backing your fist by Tropical Rythms August 2, 2020

Black Hen

Black Hen
/blackhɛn/

When a group of chefs are working together and someone let's out a smelly fart.

In turn the head chef slaps the farter directly in the belly for letting out a Black Hen.

Tom: Gary's let out another black Hen.

Kevin: That dirty stinking twat is going to get a belly slap when I see him.

Tom: I am sick and tired of everyone letting off Black Hens!

Black Hen by CannabisKings March 28, 2019

Black Screen Roulette 

A guessing game on porn video sharing websites, like rule34, where the viewer does not know what they will be watching, due to the thumbnail for the video being a black screen. This goes further into affect when the tags for said video have not been fully completed yet, so the viewer has no idea what the video is about until they play it for themselves.

Guy 1: How’s it going?
Guy 2: Not good I had to ply Black Screen Roulette today.
Guy 1: How’d that go for you?
Guy 2: It was inflation porn.

Black Screen Roulette by DJUNGELSKOGG June 3, 2021

My black heart bleeds for you 

A phrase meaning to have a strong hatred towards someone or something.

"Yay I won 100 dollars!" Said Eric.

"My black heart bleeds for you." Says Agatha.

My black heart bleeds for you by Applemilk November 2, 2016

Black Scottish Cyclops

A black Scottish man who lost his eye to a book while searching a wizard's library for a nickel, is extremely drunk, and carries a huge amount of explosives. Also a mercenary fighting over a pit of gravel, and occasionally defending hat facilities against robots. In addition, he is skilled with a wide variety of melee weapons, including bottles, haunted swords, etc.

"The Black Scottish Cyclops, now extinct!"
-The Spy

Black Scottish Cyclops by Blutarch Mann November 22, 2013

Black Heart 

A black heart (in most cases) indicates negative connotations, such as death, depression, emotionlessness, stress, anxiety, evil (etc.). It can also mean cold heartedness, a term meaning that a person is vile and evil, or without happiness and/or love.

She was given the Black Heart tag on my list because of how she had betrayed me.

Black Heart by Julius F. Tenpenny August 4, 2018

Black 

The absence of color.
A race of people that are African-American.

Black is the color of my soul. :)

Black by IvoryCastelan May 1, 2014