jazz 
(jăz)
(jăz)n.
1. Music
a. A style of music, native to America, characterized by a strong but flexible rhythmic understructure with solo and ensemble improvisations on basic tunes and chord patterns and, more recently, a highly sophisticated harmonic idiom.
b. Big band dance music.
2. Slang
a. Animation; enthusiasm.
b. Nonsense.
c. Miscellaneous, unspecified things: brought the food and all the jazz to go with it.
v. jazzed, jazz·ing, jazz·es
v.tr.
1. Music To play in a jazz style.
2. Slang
a. To utter exaggerations or lies to: Don't jazz me.
b. To give great pleasure to; excite: The surprise party jazzed the guest of honor.
c. To cause to accelerate.
v.intr.
Slang
Phrasal Verb: Slang
To exaggerate or lie.
jazz up Slang
To make more interesting; enliven: jazzed up the living area with beaded curtains.
[Originally, vim, vigor, pep, copulation, semen, perhaps shortening of earlier jasm, vim, vigor and akin to JISM.]
jazzer n.
jazzish adj.