Ringnut noun2 •(slang, humorous) A fan of the opera cycle Der Ring des Nibelungen by Richard Wagner.Ringnuts have been known to wear plastic versions of those helmets while standing in line outside the opera house. — 2007 •(slang, humorous) A fan of the novel The Lord of the Rings by J. R. R. Tolkien and/or the film trilogy based on it.27. Sit next to a ringnut and ask "so what's the deal with the ring?" every time it comes on the screen — 2003 formsRingnuts
