A deathclaw is an enemy found and fought in the "Fallout" series by Bethesda. Deathclaws have a somewhat dinosaur-like apearance with a raptor like body, razor sharp teeth, horns, and trademark claws on each hand. They are incredibly fast, have incredibly high health and are known for forcing a player to waste a copious amount of ammunition for little reward other than experience. Any true Fallout player has had at least 3 nightmares involving deathclaws, bad condition power armor and nothing but a ten millimeter pistol.
Deathclowned is a term of rising popularity (Much like Leeeroy has become) used on the video game 'World of Warcraft' to describe one who has been utterly destroyed in the Battle for Tol Barad by an unholy Death Knight. The term originated from the Realm named Terenas where the character Deathclown is known for showing no mercy to his opponents.
Dude 1: Man i just got Deathclowned! that guy just doesnt f**kingDie!!!
Dude 2: Lets go together, Il heal you!
Dude 1 & 2: F**k! we just got totally Deathclowned!