noun
Refers to specialized terminology used within a particular field or group, often difficult for outsiders to understand.
IT業界のジャーゴンは初心者にはわかりにくい。
The jargon of the IT industry is hard for beginners to understand.
彼の説明はジャーゴンが多すぎて、何を言っているのかわからなかった。
His explanation had too much jargon, and I couldn't understand what he was saying.