mix up

Short definition from Wiktionary

Verb

1. 1
   To mix or blend thoroughly and completely.
2. 2
   To combine thoroughly.
3. 3
   To prepare something from ingredients that are mixed.
4. 4
   To confuse or reverse.
5. 5
   To become involved with, especially socially or romantically.
6. 6
   To shuffle.

Noun

1. 1
   A mix, blend, or variety.
2. 2
   A confusion or reversal.
3. 3
   A confusion, mistake, muddle or misunderstanding