1. A man who is often stubborn, dumb, aggravating, unforgiving, forgetful, and just overall a complete dumbass.
2. A set of words used as an insult towards people. It can be rude or funny to some.
1. "John Admin was paid yesterday. He asked me today where his money was at. He even had a picture of me paying him his $10."
2. "Don't be a John Admin. I thought you were told better!"