mama's boy是中文里说的“妈宝男”。

【例句】
He's such a mama's boy that he can't make any decisions without consulting his mother first.
他是一个典型的“妈宝男”，每次做决定都要先征求他妈妈的意见。

Even though he's in his thirties, he still lives with his mother and relies on her for everything. He's a real mama's boy.
尽管他已经三十多岁了，但他仍然和他妈妈住在一起，凡事都依赖她。他真是个“妈宝男”。