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Wiktionary
didicoy

alt. A gypsy or traveller, especially one who is not Romani or is not full-blooded Romani. n. A gypsy or traveller, especially one who is not Romani or is not full-blooded Romani.

Wikipedia
Didicoy

Didicoy (; also diddicoy, diddykai) is a term of the Romani or " Gypsies" for " Gypsies" and travellers with mixed Romani and non Romani blood.

An example of an old Romani song about a mixed blooded Romani is the "Romano Rai" (or "Romany Rye"):

I'm a Romano Rai, just an old didikai,
I build all my temples beneath the blue sky,
I live in a tent and I don't pay no rent,
and that's why they call me the Romano Rai.

Didi-a-didi-a-didi-di-kai, chavves,
Tika-dika-tika-a-lai, (or can be; Kakka Chavve, Dekh akai)

Your Daddus tryin' to sell a mush a kushto grai.
I'm a Romano rai, just an old didikai,
I live in a mansion beneath the blue sky,
I was born in a ditch, so I won't ever grow rich,
But that's why they call me the Romano Rai.

Tikka, tikka, didikai, tikka, tikka, didikai
That's why they call him the Romano Rai

Tikka-tikka-didikai, tikka tikka, didikai,
That's why they call him the Romani Rai.

I'm a Romano Rai, a true didikai,
My temple's a mansion beneath the blue sky,
I'm a Romano Rai, a true didikai,
just campin' around, on any ol' ground,
But that's why they call him the Romano Rai.