1.
masterpiece, great work
An outstanding work of art, literature, or craftsmanship.
2.
something hilarious, a gem
Colloquially, something amusingly absurd or ridiculously funny.
傑作 has both a serious and colloquial meaning.
Serious usage:
Colloquial/ironic usage:
Related terms:
Related Words
Antonym:
駄作 (poor work)
Related:
名作 (masterpiece, classic work)
Related:
代表作 (representative work)