Top Definition
A delusional state brought on by prolonged exposure to the AMC series Mad Men so much so that it skews one's view of what is and what is not acceptable behavior in the workplace or in the home.
When Ben walked into work today, his office assistant Kathy asked him if he needed any coffee. He tossed his trench coat on her desk, slapped her ass, and told her to make him a drink. He was later summoned by Nancy in Human Resources and was subsequently suspended for madmentia, which had just been added to the codes of conduct due to the show's success.
by The West September 21, 2009

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