N-COUNT
无足轻重的人
If you refer to someone as a nonentity, you mean that they are not special or important in any way.
例句
Amidst the current bunch of nonentities, he is a towering figure...
在当前这帮无足轻重的人里面，他算是鹤立鸡群。
She was written off then as a political nonentity.
她当时被认定是成不了气候的政坛小人物。