The word you’ve been looking for your entire life! Is this underwhelming, or overwhelming, or just whelming (not a real word)? Well, whatever it is, you should also know that Nurdle is the name of other random objects as well; it is also the title of a certain kind of shot in cricket (a British base-ball like sport- I think?) and a cylindrical shaped pre-production plastic pellet used in manufacturing and package.
So yeah, you probably don’t want to get the three mixed up. Nurdle also has some verb tense. Again, in cricket, it also means “to score runs by gently nudging the ball into vacant areas of the field.” In conversation, it means to “gently waffle or muse on a subject which one clearly knows little about.” So if you’re tired of my nurdling, check out that source!