A cultural reference to drawing dicks on table tops and other related surfaces. While it is immature and wrong, it can be, at times, hysterical. D's Up is usually a formal way of greeting someone who does this sort of thing.
Guy 1: "Hey man, what's up?"
Guy 2: "Hey yo, D's Up."
Guy 1: "Ah yes, D's Up indeed."
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)