When someone keeps pinging or texting you, while u r extremely busy;
Boy 1 - textdude, pick up my messages... u shit, wat type of friend r u?
Boy 2 - text cant call u my friend, so SDM!!!
SDM is a huge movement started for people with not so huge dicks. SDM stands for Small Dicks Matter.
In a society boasting about having 12 inches schlongs... 68 percent of people just have an average dick size of 5 inches. So, if you are in those 68 percent... Come join SDM