mother best friend
A friend who acts as your mother but not in a bad way, they protect you from things and make sure that you are always okay.
I will not date Nathan because he is a player, I know this from my mother best friend.
best mother
a mother who does anything for her child even if the mother goes little for the child.
{Mother}"I love you son. your my best friend." {Son}"I love you too mama your my best friend can I have some of your cheese and crackers?"{Mother}"Of course son I would do anything for you honey!" {Son}" your the best mother ever! next time i get cheese ill share with you I promise."