A skateboarder who loves to brag about the tricks or stunts they have/can do. They will often defend, to the death, the claims they make.
"Oh. My. God, you guys. I totally landed a switch hard-flip down a five-stair yesterday!"
"Dude, you are so full of it, you can't even varial."
"No! I'm serious! I can totally do it!"
"No, you can't. You're such a skate-boaster"
"*sigh* You're right."