get a rap on the knuckles from the teacher
受到老师的批评
-He got a rap on the knuckles from the teacher for not finishing his homework.
-因为没完成作业,他被老师批评了。
-He deserved it. He spent the whole night on the Internet.
-活该,谁让他整晚都在上网。
*(give somebody/get) a rap on/over/across the knuckles - (to give somebody/receive) strong criticism for something (给某人以/受到)严厉谴责,厉声训斥