Pretentiously artistic; self-important or self-indulgent, especially when describing an artistic project.
Someone who is arty-farty.
Particular, characteristic.
Of a rare quality, unusual.
Being the only one of its kind; unequaled, unparalleled or unmatched.
Of a feature, such that only one holder has it.
A thing without a like; something unequalled or unparallelled; one of a kind.