snitch /snɪtʃ/ ( snitching, snitched, snitches )

• 1. 

  V-I To snitch on a person means to tell someone in authority that the person has done something bad or wrong. 打小报告 [非正式]

  例：

  She felt like a fifth-grader who had snitched on a classmate.

  她觉得自己就像个打同学小报告的小学五年级学生。

• 2. 

  N-COUNT A snitch is a person who snitches on other people. 告密者; 打小报告的人 [非正式]