What is the X in X-mas?
form of Japanese poetry, 1901, from name of Karai Senryu (1718-90), Japanese poet.
a three-line unrhymed Japanese poem structurally similar to a haiku but treating human nature usually in an ironic or satiric vein. It is also unlike haiku in that it usually does not have any references to the seasons. Senryu developed from haiku and became especially popular among the common people about the 18th century. It was named for Karai Hachiemon (pen name Senryu), one of the most popular practitioners of the form