Seeking the equivalent in English for "厚脸皮" I am looking for an English term for "厚脸皮". The best I can get from the web is "a thick skin". As "厚脸皮" connotes derogatory and could be used as an insult sometimes, can "a thick skin" convey the same thing? 

Are there some other terms which could be more appropriate for it?
The term is "thick-skinned"


  http://dictionary.cambridge.org/dictionary/english/thick-skinned
  
  Someone who is thick-skinned does not appear to be easily hurt by criticism:


"Thick-skinned" synonym


  http://www.thesaurus.com/browse/thick-skinned
  
  callous : insensitive; indifferent


"Thick-skinned" is the best translation for "厚脸皮". Both can be neutral or  derogatory 

Note: '厚顏無恥' (brazen) - 'Thick-skinned and shameless' is definitely derogatory