Related Clues:

• Unfamiliar jargon
• Professional gibberish
• (Thieves') slang
• Slang of a particular group, originally thieves
• Unfamiliar language or jargon
• Unfamiliar language
• Specialised language
• Language (slang)
• Language specific to an activity
• Groat (anag)
• Laymen don't understand it
• Way of speaking to fish and duck
• Group jargon
• Computerese, e.g
• Legalese, for one