whats a milk brother?

I think it means that they’ve known each other since they were babies and drank milk together?

i think just raised together as brothers but not actually related, maybe the servant guy was the son of the nanny that raised the prince

Because nobles have to work nannies usually look after their kids. The nannie (who has also just had a baby) provides milk for the baby of the nobles.

yasss they drank milk from the same tiddy

In simple terms yes (づ￣ ³￣)づ

oh lmao