1. The identification of a person by their habitual coffee drink order.
2. A fake name used when ordering coffee drinks.
1. (at coffee chain store) "They didn't ask you what drink you wanted." "Nah, they know my chai-dentity here."
2. "Why does it say 'Tom Petty' on the side of your Starbucks cup?" "Dude, that's my chai-dentity."