(Now watch, you-all, he'll up and tell me that's a real word.)

wouldn't want to disappoint...

1613 R. C. Table Alph. (ed. 3), Crupticall, hidden or secret. 1648 Boyle Seraph. Love xxiv. (1700) 145 That... cryptical Method and Stile of Scripture. 1844 De Quincey Greece under Romans Wks. VIII. 318 These cryptical or subterraneous currents of communication.