Meaning of “mixed up” - Learner’s Dictionary

mixed up

adjective uk us informal

confused:

I got a bit mixed up and thought we were supposed to be there at eight.
be mixed up in sth

to be involved in an activity that is bad or illegal

be mixed up with sb

to be involved with someone who has a bad influence on you:

Her son got mixed up with the wrong people.

(Definition of “mixed up” from the Cambridge Learner’s Dictionary © Cambridge University Press)