bros
n. countable B1 Intermediate bros
n. a friendly way to talk to or about your male friends. It is a short form of the word 'brothers'.
n. a plural informal address or reference to male friends or associates. A clipped form of 'brothers', it carries a casual, often fraternal register.
I am going out with the bros tonight.
He spent the entire weekend playing video games and watching football with his bros.
Usage
Plural only in this sense; the singular 'bro' is used as a vocative or to refer to one individual.