Definition of "mix up"

(transitive, idiomatic) To mix or blend thoroughly and completely.  examples

(intransitive, idiomatic) To combine thoroughly.  examples

(transitive, idiomatic) To prepare something from ingredients that are mixed.  examples

(transitive, idiomatic) To confuse or reverse.  examples

(transitive, usually passive voice, with with, often with be or get) To become involved with, especially socially or romantically.  quotations  examples

To shuffle.  examples

A mix, blend, or variety.  examples

(idiomatic) A confusion or reversal.  examples