This is an activity that must be partaken before a group of men participate in gathering that require them to be naked in the same room together, like a spa or a sauna.
The activity is as follows: Each person must stare at each other's dick for a full minute. And then carry on with their activity.

This happens to relieve awkwardness that occurs when you accidentally look at the other persons's dick and try to avoid looking at it.

It must be noted that there is no homosexual innuendo or logic involved in the activities or the reasoning behind the D-Club.

If an erection were to happen during the minute of the D-Club, then the erectee must perform 10-15 push-ups immediately to get rid of the major blood flow to the penis.

If there is any slight indication that someone is trying to use the D-Club for homosexual purposes, then he must be forced to leave the premises or be clubbed by the Ceremonial Club or the C-Club.

The term was first coincided by Arin Hanson aka Egoraptor.
-Are we going to that Korean spa this afternoon?
-Yeah.
-OK, let's get this out of the way. Here is my fucking Dick. Look at it!
-Woah woah woah, what the hell are you doing???!?
-Relax bro, it's only D Club.
-Oh, that's perfectly fine and reasonable now.
by Zan The Puss February 2, 2014
A club in which straight males show each other their penises to prove that they are not gay (first revealed by Aaron Hanson on the youtube channel called Game Grumps on the video called Ninjabread man)
Lets create a club where we just show each other our DICKS!

We had a club, called the D Club
by LovelyGrumpGirl April 27, 2014
Where a man goes someplace private with his friends. They get naked and gather in a circle, and look at each other's dicks.
When you realize that Markiplier is part of The D Club.
by AnonymouslyGreat April 10, 2016
When you and the homies have such a close bond that not only are you comfortable showing the goods, but can play Yahtzee, the official board game of the d club, without being gay. The "jerking off" motion is often used to roll the dice.
Person 1: Wanna have d club tomorrow at 3:30?
Person 2: Only if we can play D club Yahtzee!
Person 1: Haha, of course
by D club master 6.1 (inches) August 29, 2019
International organization for people who have been arrested for driving while intoxicated.
"Did you hear who's the newest member of the D-Dub Club?"
by zanzibarz February 14, 2008