Noun (originally an adjective)
Gros is originally an adjective that means to be fat, but it can also be used like “bro”. It is important to note that “gros” is used only to call someone. You can say “Gros, what are you up to?”, but you cannot say “I was chilling with my gros”.
Eh gros, regarde ce que j’ai fait. Bro, look at what I just did
Gros, tu fais quoi ce soir. Bro what are you up to tonight.