General Brazilian
agir com arrogância; ser arrogante
Most common and widely understood
Rio de Janeiro
fazer pose; agir com desdém
Colloquial variation, often with emphasis on superiority
São Paulo
agir com arrogância; ser prepotente
Prepotente is also commonly used in business contexts
Portugal
agir com arrogância; comportar-se com altivez
Altivez is more formal and literary in Portuguese European