wild exaggeration; nonsense; outrageous lies
Rare literary term for statements or stories that are so exaggerated they become absurd or unrecognizable. Often used in critical or dismissive contexts.
His story was so wildly exaggerated that nobody believed it.
That article is full of nonsense.
Composed of 荒 (wild, rough) and 誕 (birth, nativity, but here likely used for its sound or extended meaning of 'exaggeration'). The exact derivation is uncertain; it is a rare Sino-Japanese compound.