Brand new

Something that is unused, with all of its labels (brands) straight from the manufacturer. It may also be a service though often there is new technology involved with it.
If a person is brand new it expresses their naivety, inexperience in something. A tenderfoot, a rookie, a plebe.

совершенно новый; не бывший в употреблении

Potpuno nov. Nov novcat. Kao iz kalupa.