Mother's boy, also mummy's boy or mama's boy, is a term for a man who is excessively attached to his mother at an age when men are expected to be independent (e.g. live on their own, be economically independent).

Mother’s boy（或者mummy’s boy、mama’s boy）就是我们俗称的“奶嘴男”，指到了应该独立生活的年纪还对母亲过度依赖的男人。

Being mother-bonded is sometimes seen as a sign of weakness, and has a social stigma attached to it in many places, although in other places it may be more acceptable or perceived as normal. A mother-bonded man is seen to give control of his own life to his mother, in exchange for a sense of security.

这种“恋母”情节有时被视作软弱的标志，在很多场合都可能成为让男人丧失颜面的事情，虽然在别的一些场合，这样的情节可能没什么大不了。与母亲关系密切的男人其实是将自己的生活控制权完全交给母亲，来换取一份安全感。

Alternatively, in recent years, some have begun using the term in a milder sense, merely meaning a man who is emotionally attached to his mother. Though this sense of the phrase is still uncommon compared to the original pejorative intent, mothers in particular may state their pride in their "mama's boy" sons.

不过，近几年，“奶嘴男”的指向没有原来那么饱含贬义了，多指那些在感情上比较依赖母亲的男人。虽说这种新的解读没有原意那么普及，不过不管怎样，妈妈们都会以有个“奶嘴男”儿子而骄傲的。