Rather matey with somebody?

Hi, could you please tell me what kind of attitude you embrace when you are rather matey with somebody? I take it, it means something like friendly or sociable. (it’s probably the adjective of mate?)

But is there a second meaning to it that describes the opposite of being friendly?

Thanks in advance,

TOEIC short conversations: Two co-workers discuss a memo on dress code[YSaerTTEW443543]

Hi Torsten,

You’re absolutely right. It comes from the word mate and suggests friendly/sociable.