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.
例句
The manual is full of the jargon and slang of self-improvement courses.手冊(cè)里滿是有關(guān)自修課程的行話術(shù)語(yǔ)。...the reading habits of 600,000 C2 males (marketing jargon for skilled manual workers).60萬(wàn)C2男性的閱讀習(xí)慣（C2為銷(xiāo)售行業(yè)行話，指從事體力勞動(dòng)的熟練工人）
英漢詞典釋義
n.
行話; 黑話; 隱語(yǔ),行業(yè)術(shù)語(yǔ),切口
Doctors, actors and sailors have jargons.醫(yī)生、演員和水手都有自己的行話。
英英詞典釋義
Noun
1. a characteristic language of a particular group (as among thieves);
"they don't speak our lingo"
2. a colorless (or pale yellow or smoky) variety of zircon
3. specialized technical terminology characteristic of a particular subject