Top Definition
degenerative, age-related disease that impairs an individual's ability to procrastinate, often brought on by fits of responsibility and consideration for the time of others, ultimately resulting in being on time for any appointment or deadline.
He used to say he'd be there in 10 minutes, which I knew meant an hour, but he was actually there in 10! His ontheimer's must be setting in.

I think her retirement triggered her ontheimer's. Marriage might be the only cure, or a subscription to a cute kittens channel on YouTube.
by layer14 April 29, 2010

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