No, Judgment isn’t blockable.
You can block anything that would otherwise be affected by Dodge/Deflect, or Impaired Aim/Fumble. A great many things don’t care about those stats, and they tend to be innately AoE effects or debuffs that directly apply something to a player.
These are not debuffs; but to get even further away from this thread, now you’re treading into the difference between Debuffs and Debuff Effects. I’ve written at length about this subject already on reddit, so just skim through these posts: