Club Penguin message from Rookie

 Rookie has sent us another EPF message on our Club Penguin spy phones. Rookie explains a finding in the box dimensions. Below is the spy phone message:

  It says:
 "Hey! If you rearrange the letters in 'box dimension' you can spell 'BeD mix onions'! I'm not sure what it means, but it sounds delicious!"

I wonder what the words really mean? Could Rookie of misspelled it and it could be a message from Herbert? Let me know in the comments below.