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An act of which a most un-intellegent person who has indulged in syntetic narcotics wigs out after feeling like they are O.D'ing. Often the subject/spanner who is "falling off the dragon" Will be found flat on their back making pirate like noises. A person who has fallen off the dragon can be revived simply by pouring cold water on them.
Person 1. "Oh dear, looks like Tony has fallen off the dragon" Person 2. "what makes you say that?" "Person 1. "he is lying on the floor screaming like captain blackbeard"

Tony "hey guys, sorry I fell off the dragon last night, too many sunthetics Im affraid."
by crakas May 13, 2013