ˌmixed ˈup BrE AmE adjective
1 . be/get mixed up in something to be involved in an illegal or dishonest activity:
He’s the last person I’d expect to be mixed up in something like this.
I’d have to be crazy to get mixed up in that kind of thing.
2 . be/get mixed up with somebody to be involved with someone who has a bad influence on you:
When he left college he got mixed up with the wrong people.
3 . [not before noun] confused, for example because you have too many different details to remember or think about:
I get all mixed up over the money whenever I travel abroad.
4 . ( also mixed-up ) informal confused and suffering from emotional problems SYN screwed up :
She’s just a crazy mixed-up kid.
⇨ mix up at ↑ mix 1 , ⇨ ↑ mix-up