Done in an insincere and mocking manner; satirical.
Acting in a unserious and teasing manner.
Odd or coincidental; strange.
Characterized by or constituting (any kind of) irony.
Very amusing, hilarious.
Treasured; held in high regard.
Without a price assigned.
Ridiculous, absurd, rich.
So precious as not to be sold at any price; invaluable.
Excellent, wonderful, fantastic.