N-UNCOUNT 行话;行业术语;黑话 You use jargon to refer to words and expressions that are used in special or technical ways by particular groups of people, often making the language difficult to understand. 行话;行业术语;黑话
The manual is full of the jargon and slang of self-improvement courses.
手册里满是有关自修课程的行话术语。
...the reading habits of 600,000 C2 males (marketing jargon for skilled manual workers).