To be completely plastered out of your mind. This word arose from Ireland, where people are usually assumed to be able to drink a lot. Their ability to drink so much came from their sadness over their small genitalia. But, when someone from Ireland lacked any alcohol tolerance, they would be outcast, in quite the same manor the Patriot fans are rejected by society at large. These people were considered nutmegged at the time of their drunkenness.
Someone who develops an unnatural attachment to another person, especially when that person is unworthy of being put on a pedestal. Basically someone who obsesses over a giant loser, in effect, making them an even bigger loser for emulating that person.
Ashley is a giant nutmugger on Leah, which is really disappointing, considering that Leah is more annoying than the freecreditreport commercials.