Synonyms for jazzed-up
- high geared
- high performance
- high speed
by 1912, American English, first attested in baseball slang; as a type of music, attested from 1913. Probably ultimately from Creole patois jass "strenuous activity," especially "sexual intercourse" but also used of Congo dances, from jasm (1860) "energy, drive," of African origin (cf. Mandingo jasi, Temne yas), also the source of slang jism.
All that jazz "et cetera" first recorded 1939.