swelled head (noun)

1. In the midst of their whirlwind romance, her swelled head made her think she was the most important person in the world.

2. During the French Revolution, Marie Antoinette's swelled head led her to believe that she was untouchable and above the suffering of the common people.

3. In Greek mythology, the god Zeus is often depicted with a swelled head, as he believes he is the most important deity in the pantheon.

4. In the horror movie, the antagonist's swelled head convinces him that he is invincible and superior to all other beings.