To act 100% retarded with extra no redeeming special quality.
Downey: "Everybody knows you never do a full retard."

Stiller: "What do you mean?"

Downey: "Check it out. Dustin Hoffman, 'Rain Man,' look retarded, act retarded, not retarded. Count toothpicks to your cards. Autistic, sure. Not retarded. You know Tom Hanks, 'Forrest Gump.' Slow, yes. Retarded, maybe. Braces on his legs. But he charmed the pants off Nixon and won a ping-pong competition. That ain't retarded. You went full retard, man. Never go full retard."
by D. Ocean August 28, 2008
Phrase used by Robert Downey Jr.'s character in the movie Tropic Thunder. Referring to when an actor playing the mentally retarded goes all out leaving the viewer unable to connect.
Sean Penn went Full Retard in I Am Sam
by Dane Adi August 25, 2008
1) Somewhere you never should go.
2) Playing a mentally handicapped person in a film or show with no exceptional or redeeming skills.
You went full retard man. Never go full retard.
by Anon_999@yahoo.com August 12, 2008
A level of retard you should never, ever go to.
You went full retard man. Never go full retard.
by Rushing Roulette August 14, 2008
act stupid, moronical or like an imbecile
never go full retard!
by kajoe August 06, 2008
to get so drunk that you are no longer a fully functioning human being.
Dude Todd is so fucking drunk. He has gone full retard.
by cariboulou2013 November 01, 2009

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