وَلَا تُصَعِّرْ خَدَّكَ لِلنَّاسِ وَلَا تَمْشِ فِى ٱلْأَرْضِ مَرَحًا ۖ إِنَّ ٱللَّهَ لَا يُحِبُّ كُلَّ مُخْتَالٍۢ فَخُورٍۢ ﴿١٨﴾
E não vires o rosto às gentes, nem andes insolentemente pala terra, porque Deus não estima arrogante e jactanciosoalgum.
Haram Speech & character
Is pride and arrogance haram?
Short answer
Yes. Allah does not love every arrogant boaster (31:18), and tells us not to walk proudly on the earth (17:37). Pride is rejecting the truth and looking down on people. Humility is the way of the believers.
Evidence
Quran
وَلَا تَمْشِ فِى ٱلْأَرْضِ مَرَحًا ۖ إِنَّكَ لَن تَخْرِقَ ٱلْأَرْضَ وَلَن تَبْلُغَ ٱلْجِبَالَ طُولًۭا ﴿٣٧﴾
E não te conduzas com jactância na terra, porque jamais poderás fendê-la, nem te igualar, em altura, às montanhas.
This is general information, not a fatwa. For your own situation, ask a qualified scholar.
Questions about halal and haram
Is pride and arrogance haram?
Yes. Allah does not love every arrogant boaster (31:18), and tells us not to walk proudly on the earth (17:37). Pride is rejecting the truth and looking down on people. Humility is the way of the believers.