He would have felt like an irate ticket-holder at a prize-fight where the principals refused to mix it up.

And Carl hasn't really been mixing it up with the fans.

Q. What is her impact right now on the Republican Party, and does it bother you?
A. She's a star. Why--it doesn't bother me. I mean, she is out there mixing it up, she's conveying her views, she's animating people to come forward and participate in the political process.

This one's more business. You don't have the time to travel. You don't have the time to, ah, mix it up.

Indeed, why not try mixing it up even more by adding a completely different deer vocalization to the mix, or maybe more, to make the woods come alive with the sounds that deer make?

Mix it up

Meaning

Verb