fantastic

ludicrously odd

“fantastic Halloween costumes”

fanciful and unrealistic; foolish

“a fantastic idea of his own importance”

existing in fancy only

“fantastic figures with bulbous heads the circumference of a bushel”

extraordinarily good or great; used especially as intensifiers

“a fantastic trip to the Orient”

extravagantly fanciful in design, construction, appearance

“Gaudi's fantastic architecture”