slang expression

1. ( This is not slang but a very British English expression.)
   （它不是俚语却是非常地道的英式表达）
2. The teacher hauled him up for using such a slang expression in an essay.
   老师责备他在论文中使用这样的俚语。
3. We must view its application in developing sense and try our best to use proper slang to enhance the expression lively.
   并在语言使用中适当地运用英语俚语，使英语表达更加生动活泼。

noun

1. informal language consisting of words and expressions that are not considered appropriate for formal occasions
   1. their speech was full of slang expressions

   Synonym:    slangslang term