to imbue (a piece of music) with jazz qualities, esp by improvisation or a quicker tempo
to make more lively, gaudy, or appealing
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Other Idioms and Phrases with jazz up
Enliven, make more interesting, as in They jazzed up the living room with a new rug, or They decided to include a comedy act to jazz up the program.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.