inflatable head syndrome

A disease in humans that causes the victim to believe that everything they say or do is ultimately correct.

Symptoms may include arrogance, aggressive behavior, self imposing of deity-like traits, and in some rare cases, jaundice. More case studies reveal that IHS can be linked to anxiety, eating disorders, and other mental health disorders that are similar to ADHD.

Person 1: I've come to ignore President Trump's bravado, mostly because of my belief that he has inflatable head syndrome.
Person 2: Well maybe you have it too!