Ditto/ˈdɪtəʊ/ Definition 1 of 4Pro Tip 1/3Expressing Agreement Use 'ditto' to show you agree with or have the same preference as someone else. A: 'I think this song is amazing.' B: 'Ditto!' Pro Tip 2/3Echoing Orders 'Ditto' can quickly repeat someone's choice when ordering food or drinks. A: 'I'll have the Caesar salad.' B: 'And ditto for me.' Pro Tip 3/3Colloquial Usage 'Ditto' is casual; avoid it in formal writing or speeches. During a casual conversation, you can say 'ditto,' but not in a business report.