zidouken

(noun) 1)The "headbutt heard 'round the world", performed by Zidane on Materazzi in the final match of the 2006 World Cup. A combination of Zidane's name and "hadouken", a technique found in the Street Fighter video game. (noun) 2)Any powerful headbutt to the chest which results in the victim being knocked down/unconscious (verb) 3)To perform the above maneuver.