also pizzaz; pizzazz, 1937, probably originally college or show-biz slang.
Pizazz, to quote the editor of the Harvard Lampoon, is an indefinable dynamic quality, the je ne sais quoi of function; as for instance, adding Scotch puts pizazz into a drink. Certain clothes have it, too. ["Harper's Bazaar," March 1937]
Energy; power; pep, piss and vinegar: What's missing is overall pizzazz and pace
[1937+; origin unknown; perhaps echoically suggested by piss, ass, and piss and vinegar]