under the counter idiom       
 (购买东西)秘密地,暗地里,非法地
Things bought under the counter are bought secretly and illegally.
  The kids managed to get cigarettes under the counter. 这些孩子暗地里弄到了香烟。 
 
英汉双解词典收录81607条英汉双解翻译词条,基本涵盖了全部常用单词的读音、翻译及用法,是英语学习的有利工具。