>>2851295It's a term coined by 16 year old /v/irgins pretending to be oldfags who want to look hip and cool.
The first people resembling """ironic weebs""" popped up in the mid-90s when TV anime was actually becoming semi-popular in the West and as the internet was finally becoming mainstream, you saw entry-level retards who's tastes only went as deep as Sailor Moon or Dragon Ball pop up on the internet but pretended to like more anime than they let on and referenced shows they never even watched just to fit in with the existing anime crowd on the internet.