gin (v.1)youdaoicibaDictYouDict[gin 词源字典]
in slang phrase gin up "enliven, make more exciting," 1887 (ginning is from 1825), perhaps a special use of the verb associated with gin (n.2) "engine," but perhaps rather or also from ginger up in the same sense (1849), which is from ginger in sense of "spice, pizzazz;" specifically in reference to the treatment described in the 1811 edition of Grose's slang dictionary under the entry for feague:
... to put ginger up a horse's fundament, and formerly, as it is said, a live eel, to make him lively and carry his tail well; it is said, a forfeit is incurred by any horse-dealer's servant, who shall shew a horse without first feaguing him. Feague is used, figuratively, for encouraging or spiriting one up.
[gin etymology, gin origin, 英语词源]
pizazz (n.)youdaoicibaDictYouDict
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]