"made more lively or colorful," 1919, past-participle adjective from jazz (v.).

1921; see jazz (n.); popularized 1922 in writings of F. Scott Fitzgerald; usually regarded as the years between the end of World War I (1918) and the Stock Market crash of 1929.

We are living in a jazz age of super-accentuated rhythm in all things; in a rhythm that (to "jazz" a word) is super-normal, a rhythm which is the back-flare from the rhythm of a super war. ["Jacobs' Band Monthly," Jan. 1921]

1917, "low, vulgar jazz," from jazz (n.). Later in 20c. it was in use as a derogatory term for persons, especially blacks.

1977, originally a proprietary name, from jazz (n.) + ending from exercise (n.).

"poetry reading accompanied by jazz music," 1959, from jazz (n.) + poetry.

1917, from jazz (n.) + man (n.).

"resembling jazz music, spirited, lively, exciting," 1918, from jazz (n.) + -y (2). Related: Jazzily; jazziness.

"seminal fluid, cum," 1899; earlier "energy, strength" (1842), of uncertain origin; see jazz (n.).

1894, a slang word but the earliest uses are unclear as to sense, perhaps a varied reduplication of jazz (n.). The word had early associations with jazz, which by the 1930s had become disparaging, "old-fashioned jazz," especially in contrast to swing.