That comes from "huevón", which is... really hard to explain in English. The Argentine "boludo" and "pelotudo" are in the same vein, and mean roughly the same

That comes from "huevón", which is... really hard to explain in English. The Argentine "boludo" and "pelotudo" are in the same vein, and mean roughly the same non-sensical thing. I'm not sure if the etymology is that an egg ("huevo") looks like a zero, so a dumb person or a loser is a "huevo" (an egg, meaning a zero) or "huevón" (huge zero), or if it has to do with testicles (because in Spanish it's common to call them eggs), so a "huevón" might someone who's "as dumb as a giant testicle". "Boludo" and "pelotudo" are more like the latter, for sure, though they could still derived from zero looking like a ball. > The "w" sound keeps repeating in the themes here, interesting. In weón it's really just a slight change from huevón, and mostly just dropping the 'v'.