There are a lot of words and phrases which Nigerians Use wrongly and these include the words; “kid brother” and “kid sister”. Please stop referring to your YOUNGER SISTER or YOUNGER BROTHER as ” kid sister ” or “kid brother” if they’re no longer kids or if you’re just a few years older than them. I have heard many people use such terms to refer to siblings whom they’re just a few years older than and I think it’s only proper if we put things in the right perspective. 

Your “kid sister” or “kid brother” is a sibling born when you’re already grown into adulthood or adolescence at worst, not just any sibling who’s younger than you. Please take note.