Apparently from Chaucer.
japeworthy (comparative more japeworthy, superlative most japeworthy)
- (archaic, rare) Worthy of being japed, mockable.
- 1975, Georgette Heyer, My Lord John, 1976, Bantam Books, page 299,
- All over Europe, people were cracking the lewdest jests about them; no one could decide which of the two was the most japeworthy; […] .