To alter, change, or adjust some variable factor, aspect, or element of something. A noun or pronoun can be used between "vary" and "up." I'd like to start varying up the dinners we make each week—we've been getting stuck in a routine of making the same stuff. You should vary your workout up if you want to really improve your body.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
To change the variables associated with something: The cafeteria varied up its menu with a new kind of sandwich. You've worn the same blue sweater all week—why not vary it up and wear something new?
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.