1. mother hen 关心他人冷暖的人；婆婆妈妈的人
Sandhu is like a mother hen, catering to the students' every need.
2. mother figure 慈母般的人，母亲的化身
It was similar to having a mother figure—but she was also our strength and conditioning coach.
3. mother-naked （像刚出生时那样）一丝不挂的，赤条条的
Dan was lying mother-naked.
4. mother wit 天资，常识
When you have to live by your mother wit, old boy, I hope you may get on better than I do.
5. mother's milk hardly dries on lips 乳臭未干，形容人幼稚
Your mother's milk has hardly dried on your lips and you want to go into the army!
6. tiger mother 虎妈，对子女学业要求严厉的母亲
My friend John has a tiger mother.