the black d 

A mystical aura that brings death and sadness to the land.
Or a large black mans massive dick

"Hey dude, remember when Europe was hit by The Black D back in the 1450's."

"Yeah man, I read that even the queen of England took The Black D"

the black d by Merriam Websta man c===8 January 22, 2014

D the B 

drink the beer. A common game played on party scenes where one person will partake in consuming one container of any beer based liquid. Once this liquid is consumed the reward is another. The game continues on in this order.

"YO man! Wanna play D the B?" "Maybe how do i play" (1st person hands 2nd person a beer respectively.) "down this broha!" (number two drinks) " alright done, what do i win?" "Another BEER!"

D the B by Liam Cogan February 24, 2010

The Flying D 

When you use your fully erect penis to hit someone, i.e. your friend or lover, in the face. You must run across the room adjacent of the target, yelling their name; at the mid way point of the room, to gain their attention, then aiming for the nose of said person after jumping in the air, bringing your erect penis down like a drop kick.
If done correctly, their nose should be bleeding.

"Frank... I hate you..."
"Why?"
"Because I think you broke my nose when you gave me the Flying D."

The Flying D by TheMeatiestOfShields February 24, 2017

The 5 D's 

A term used to describe 5 types of quests, which make a bulk of quests in MMORPGs (Massively Multiplayer Online Role-Playing Games):

1.) Destroy
2.) Deliver
3.) Discover
4.) Defend
5.) Drop

"Nobody is saying abandon the 5 D's, but you can add each quest an individual flavour.."

The 5 D's by Lokosicek June 30, 2017

The 4 d rule

The 4d rule is a rule imposed on exchange students in the United States by their exchange association. It prohibits students from driving, drinking alcohol, using drugs, and dating American partners (banging yankee blondes and brunettes)

The tacit rule popular among exchange students is to break these rules as quickly as possible without being caught by their host family.

Hey bro if I bang Taylor tonight at the prom after party at Danielle's house it would have only taken me two weeks to break the 4 d rule!

Can you pass me the bang ??

The 4 d rule by IWANNABEANHOMOSEXUAL August 3, 2018

The John D. Theory 

Any object, substance, or person has been created or built by a man/woman named John/Joan D. Whatever they created takes the place of their last name.

The John D. Theory is as follows: John D. Earth, also known as God, created the Earth.

The John D. Theory by Kyle Ninneman February 28, 2020

The Bart D

Walking and talking while bopping your head back n forth

Yo look at the guy walking, he’s doing the Bart D!

The Bart D by Hot_pocketts August 2, 2021