不知羞耻

不知羞恥
bùzhīxiūchǐ
  1. to have no sense of shame
  2. brazen

CEDICT

Entry Composition

1 不知 bùzhī
  1. not to know
  2. unaware
  3. unknowingly
  4. fig. not to admit (defeat, hardships, tiredness etc)
2 羞耻 xiūchǐ (a feeling of) shame

Related entries

恬不知耻 tiánbùzhīchǐ to have no sense of shame
厚脸皮 hòuliǎnpí
  1. brazen
  2. shameless
  3. impudent
  4. cheek
  5. thick-skinned
大胆 dàdǎn
  1. brazen
  2. audacious
  3. outrageous
  4. bold
  5. daring
  6. fearless
你们也太大胆了吧！

You were also too brave!

Source: Tatoeba

脸皮厚 liǎnpíhòu brazen
颜厚 yánhòu brazen
悍然 hànrán
  1. outrageous
  2. brazen
  3. flagrant
没脸没皮 méiliǎnméipí
  1. shameless
  2. brazen
胆肥 dǎnféi
  1. (coll.) bold
  2. brazen
  3. to have a lot of nerve
脸厚 liǎnhòu
  1. thick-skinned
  2. brazen
老脸 lǎoliǎn
  1. self-respect of old person
  2. face
  3. thick-skinned (i.e. impervious to criticism)
  4. brazen