'Fantastic Joes' are usually seen pwning any number of undesirables, including waste cadets, nub biscuits, Chuckleheads, N00btrons and Chodey McChodersons.
Word often ironically used in a 'gaming' context.
Can also be used in verb form.
See also: God, Joe Kickass, Chuck Norris, Leonidas, Badass, pwntastic, Sex God, Gigant0r, Korean High Five, Epic, Uncle Philed, Robocop, Roflcopter, Filth Wizard, lol
Example #1 (Noun form)
Cuthbert: "Crikey! Who's that fellow Reginald!? I daresay he seems to be pwning!"
Reginald: "I've not the foggiest! But he sure is a Fantastic Joe..."
Example #2 (Noun form)
Old Lady: "Oi! Someone stop that toerag! He's nicked my 'andbag!"
*Thief begins to run and is suddenly accosted*
<unknown man>: "Citizen, stop. Your have 5 seconds to comply...
Stunned Onlooker: "Wtf? Who's this Fantastic Joe?"
Example #3 (Verb form)
Insane armed man #1: "Punk! Step back! These are my Doritos!"
Insane armed man: "Mother chode! I'ma Fantastic Joe yo' ass!" *opens fire*
Example #4 (Verb form)
*Day of Defeat is being played. Suddenly a heavy jumps out of a bush like a maniac with a BAR and headshots a proner in the face*
Bush dwelling maniac: "You just got Fantastic Joed"