平庸之輩

平庸之辈
píngyōngzhībèi
  1. a nobody
  2. a nonentity

CEDICT

才能平凡的人。

重編國語辭典

Entry Composition

1 平庸 píngyōng
  1. mediocre
  2. indifferent
  3. commonplace
2 之 zhī
  1. (possessive particle, literary equivalent of 的 de)
  2. him
  3. her
  4. it
3 輩 bèi
  1. lifetime
  2. generation
  3. group of people
  4. class
  5. classifier for generations
  6. (literary) classifier for people

Related entries

小人物 xiǎorénwù
  1. nonentity
  2. a nobody
小人物同样可以创造历史。

Small timers can also create history.

Source: Tatoeba

無名小卒 wúmíngxiǎozú
  1. insignificant soldier (idiom)
  2. a nobody
  3. nonentity
他不过是个无名小卒而已。

He is just a Mr Nobody.

Source: Tatoeba

小卒 xiǎozú
  1. foot soldier
  2. minor figure
  3. a nobody
  4. (chess) pawn