A question asked not because the the person asking the question is actually wondering if someone is sitting "here", but more likely asked because the person wants to start a conversation with the person sitting next to the seat in question.
Dougy: "Is anybody sitting here?"
Girl sitting in class: "No..."
Dougy: "So whats up?"
Girl: *makes a strange look and moves away*
Dougy: "Dude whats her problem, she probably thought I was trying to hit on her or something...bahaha"
A word describing a person who serves an ace in a volley ball game and is then an asshole about it.
Acehole: "6 serving 3. (Acehole serves) Yes, ace! In your face noobs! My grandma can return a serve better than that. Why don't you just walk off the court now before I crush you again?"