What is :dgc?
1.
A smiley of a guy fapping. The colon is his mouth, the capital letter D is his giant grin, the G is his two arms, with the right one bent around to grab his penis, which is represented by the squared off inner part of the G, and finally the C are his curvy yet stable legs, which support his fapping.
So you see children, :DGC makes an excellent picture of a man fapping, please bring your homework next class, and remember that :'(GC is what kids look like when they have fapped to a zebra and have realized a horrible truth about themselves.
See