Allah SWT has filled the Jahannum (hell) with people who do Takabbur. Mutakabbir (متکبّر) is a person who believes he is superior to other people, and that the human beings are inferior to him, who thinks he is great, and other people are insignificant. Allah SWT doesn't like a human being doing Takabbur at all. In a Hadith it says that Allah SWT said that Greatness belongs to me. Whoever else tries to share it with me I will put him in fire.

Adapted from the talk "Do not disrespect the poor" by Mufti Muhammad Taqi Usmani RA