Espousing a view about a subject that you know absolutely nothing about. Most nonpinions are used by uninformed people who stole those opinions from someone else, but they can't back it up due to not understanding the very subject.

Adj. Something that is expected to have a long lifespan by virtue of having existed for a long time, based on the lindy effect, named for the New York restaurant Lindy's, coined by Albert Goldman and popularized by Nassim Taleb.