A misspelled synonym. Nymoyms are often used by illiterates or people who type too fast and don’t care to correct it. The name stems from the norwegian family line of Nymoen, who often uses nymonyms.
The stupid sound stupid idiots make when they’re stupidly eating their stupid stupid food. They’re so stupid I hate them. They won’t shut the fuck up i hate stupid idiots who go nymnymnym. I fucking hate you carlos you stupid bastard I’m not stupid capitalizing the first stupid letter of your dumb stupid name. I hate you see this carlos I fucking hate your stupid dumb guts. Stupid dumb idiot.
“Nymnymnym”
“SHUT RHE ACTUAL FUCK UP I HATE YOU CARLOS YOU STUPID DUMB IDIOT”
A fucked up nickname that somewhat resembles your propername, and even if it doesn't, is something you eventually resort to answering to.
My co-worker's real name is Meredith, but our boss calls her by her nomonym, Merm-the-worm, because she is tall and thin (and because he is a jackass).