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When one someone thinks or acts like they were involved in an action, event or conversation yet they arrogantly forgot their lack of participation
Ted: "Hey, Bill. Did you see me do that 30 second keg stand at your party last night!?"
Bill: "You weren't there, Ted. You weren't there..."
Ted: "Sorry, Bill. I contracted a bad case of manesia."
by kelsque January 06, 2010
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When a man begins an activity and doesn't complete it because they forgot there is more than 1 step.
My husband took the trash out but was struck with a sudden case of manesia and forgot to put in a new liner. OR Tommy out his clothes in the washer but due to his chronic manesia it sat there for days and had to be rewashed.
by Someartypants October 03, 2017
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