super-duper adjective exceptionally good US,1940 Childish, or intentionally evocative of childishness.
— Lou Shelly, HepcatsJiveTalkDictionary, p. 35, 1945
“Probably one of those super-duper television screens like C.B.S. and NBC have been experimenting with,” I surmised. — Robert deCoy, The NiggerBible, p. 179, 1967