NoMo refers to a woman who is not a mother, particularly by circumstance rather than by choice. (not + mother)

“非媽族（mot+mother）”指不是母親的女性，她們通常不是自愿選擇不做母親，而是境況使然。

Example:

Once I'd begun to make peace with this idea, I felt I could start moving forwards. And I discovered I was far from alone. There were plenty of us so-called "NoMos" out there.

一旦我開始坦然接受，我就覺得我可以繼續(xù)生活下去。而且我發(fā)現(xiàn)我并不是孤單一人，像我一樣的“非媽族”還有很多。