Troll

A person who says, acts, or in anyway propagates or initiates a falsehood, intentional hot button, or emotional reaction for the sole purpose of personal enjoyment/satisfaction and/or "humor".

Trollish Person: Hey, dude, I'm sorry but I can't make it to your show tonight. I have band practice.
Normal Person: Really man? That's too bad. I've been working really hard.
After the Show...
Normal Person: Wait, I thought you weren't coming?
Trollish Person: Naw man, tots kidding. I was gonna go the whole time. I just wanted to see your face ha ha ha.
Normal Person:...
Trollish Person: (no longer able to speak.)