A mama’s boy
E.g. I thought I loved him until I realized he was a momma’s boy who can’t do anything without his mother’s permission or approval.
At your mother’s knee
E.g. I learned how to bake at my mother’s knee when I was just a girl.
Everyone and his mother
E.g. I’m so jealous, everyone and his mother is going on a vacation this summer except for me.
A mother hen
E.g. Jenny can be a bit of a mother hen when we’re out at the bars.
Be tied to (one’s) mother’s apron strings
E.g. Can you make a decision on your own, or are you tied to your mother’s apron strings?
Like mother, like daughter
E.g. My mother loved sweets, and everytime my father saw me with a cookie in my hand, he would sigh, “Like mother,like daughter.
The mother of all (something)
E.g. Wow, that is the mother of all sandwiches.It’s a foot high!
E.g. Look at all the wonders that Mother Nature provides, from fruit and vegetables to beautiful mountains and oceans.
A face only a mother could love
E.g. The poor baby has a face only a mother could love.
E.g. I know the subway’s crowded, but you should really give your seat to the expectant mother standing by the door…