This is the 1913th most frequent Portuguese word.
brother
The Portuguese word "brother" (borrowed from English) means "brother" or is used informally to mean "friend" or "dude."
Here, 'irmão' is used in its literal sense to refer to a male sibling.
Meu irmão é uma ótima pessoa.
My brother is a great person.
In this sentence, 'brother' is used colloquially as a friendly term to address someone, showing camaraderie.
E aí, brother, como você está?
What's up, brother, how are you?
Here, 'irmãos' metaphorically expresses a bond of friendship and solidarity.