When you solidify semen by freezing it into nugget shape, then insert it into a woman's anus, waiting for it to melt and leak out before being served to the man eating ass.
Person 1: Last night, my girl made me some tasty anal nutnuggets, it was great.
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.