welsh concussion
A type of surprise attack in which you take a keyboard, and smash it over the target's head. It's an effective way to cause a lot of pain to the receiver.
Person 1: Did you here that Chad got a Welsh Concussion?
Person 2: Yeah, I did. He had it coming, he was a massive douchebag.
Person 2: Yeah, I did. He had it coming, he was a massive douchebag.