Thievesʹ Latin
.“What did actually reach his ears was disguised so completely by the use of cant words and the thievesʹ Latin, called slang, that he … could make no sense of the conversation.”—Sir W. Scott: Redgauntlet, chap. xiii.
“He can vent Greek and Hebrew as fast as I can thievesʹ Latin.”—Sir W. Scott: Kenilworth, chap. xxix.