Top definition
A condition where someone remembers exactly every single detail of information their brain ever gets since their brain developed memory storage capability.
A. I told Dick five years ago that my friend's father's boss's step son had a dog named Mimi. I asked him yesterday who Mimi is and he answered just exactly.
B. No shit man, he's fuckin hypermnesia
by obnoxiousness March 17, 2013
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