It's an exaggeration of ignore. You use it when someone gets ignored, or you want to show someone that his opinion is insignificant. Or if you want to 'troll' someone.
a. To judge something superficially or with a short-sighted understanding due to reluctance, neglect, or ignorance of decisive facts, evidence, or knowledge.
She was so Ignorized she avoidedcrucialfacts that contradicted her arguments.