thick-skinned /-ˌskɪnd/
  (a.)厚皮的,臉皮厚的,感覺遲鈍的
  Thick-skinned a. Having a thick skin; hence, not sensitive; dull; obtuse.
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  thick-skinned
       adj : emotionally hardened; "a callous indifference to suffering";
             "cold-blooded and indurate to public opinion" [syn: callous,
              indurate, pachydermatous]