A special attack introduced in the popular fighting game "Street Fighter" made by Capcom and has since become a staple to the series. It is known to be used by Ryu, Ken, and Akuma. A similar strike can be performed by Dan as well.
The attack itself is a projectile of fire/ether emitted from its casters palms and travels in a forward direction.
Hadouken can also refer as a social status designating your cool credibility.
I will spam my hadoukens across the stage so you can't come near me!
Eddy is soooo hadouken for pimp smacking that girl when she cheated on him. He is so down-right fierce!