Possible Clues:

• Term used by an inventor
• Is 'engloom' a newly coined word?
• Some lingo newly expressed
• Word coinage
• This coinage is not, said de Quincey, in revolutionary times, an infirmity of caprice
• Some lingo translated for new expression
• Go on, smile, in preparation for new term!
• Go miles on counterfeit coinage
• Go on, smile! That's funny new word!
• Lingo some characters used originally