get mixed up with (someone)

get mixed up with (someone)

To become involved with someone negative or troublesome. Don't get mixed up with a dangerous crowd like that.
See also: get, mixed, up

be/get mixed ˈup with somebody

be/become friendly with or involved with somebody that other people do not approve of: I told her I didn’t think she should get mixed up with that group, but as usual she ignored my advice.
See also: get, mixed, somebody, up