aka Random Dicking. Bored? Without looking at the keyboard, or thinking about it, type a word. Now, this may or may not be an existing Urban Dictionary def. Probably not. Just pick the UD def closest to your mumbo jumbo -- or the closest INTERESTING one. It will open up a new world to you, and you will learn many wonderous things!
"Hey, you wanna watch the game tonight?"
"No, I'm meeting my blind date tomorrow. She's a college girl. I don't want to seem stupid or uncool, so I'm going to do a bunch of Random Urban tonight to brush up on my hip lingo."