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 exaggerate or lie 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 

       To exaggerate or lie.

  Phrasal Verb:
  jazz up Slang 

       To make more interesting; enliven: jazzed up the living area with beaded curtains. 

  [Origin unknown.]

  jazzer n. 
  jazzish adj.

 Source: The American Heritage® Dictionary of the English Language, Fourth Edition
 Copyright © 2000 by Houghton Mifflin Company.
 Published by Houghton Mifflin Company. All rights reserved.
 

 jazz

1: music that originated in New Orleans around 1900 and developed through increasingly complex styles 2: empty or insincere or exaggerated talk; that's a lot of wind"; "don't give me any of that jazz" [syn: wind, idle words, nothingness] 3: a style of dance music popular in the 1920s; similar to New Orleans jazz but played by large bands v 1: play something in the style of jazz.

2: have sexual intercourse with; "This student sleeps with everyone in her dorm"; "Adam knew Eve" (know is archaic); "Were you ever intimate with this man?" [syn: love, make out, make love, sleep with, get laid, have sex, know, do it, be intimate, have intercourse, have it away, have it off, screw, fuck, eff, hump, lie with, bed, have a go at it, bang, get it on, bonk] 

 Source: WordNet ® 1.6, © 1997 Princeton University