Playing golf with clients is one way to 'mix business with pleasure'. [=to do something enjoyable that is related to your work]
I accidentally 'mixed up' the two files. [=I put each of the files in the place where the other one should have gone]
He 'got mixed up in' a plan to destroy the government. [=he became involved in a plan to destroy the government]
(..) oh,yeah... oh,good lord. She said,"you don't know me" "you don't wear my chains" oh,yeah. God,that's a good song. If you're compiling a mix cd for a double suicide. Oh,I hope that scratching post is for you. I know what you're thinking. I've taken your asthma into account. (..)2007 TvShow: The Big Bang Theory Title: The Fuzzy Boots Corollary Season: 1 Episode 3