/ ˈdʒɑːgən; NAmE ˈdʒɑːrgən/ noun
[ U ] (often disapproving ) words or expressions that are used by a particular profession or group of people, and are difficult for others to understand :
medical / legal / computer, etc. jargon
Try to avoid using too much technical jargon.
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WORD ORIGIN
late Middle English (originally in the sense twittering, chattering , later gibberish ): from Old French jargoun , of unknown origin. The main sense dates from the mid 17th cent.