noun
tengu haiku game; parlor game of collaborative 5-7-5 poem
A traditional parlor game where three people each write one line of a 5-7-5 poem without seeing the others' lines, often producing humorous or absurd results. The name references tengu, mythical creatures associated with mischief.
See also: 天狗
宴会で天狗俳諧をして、みんなで大笑いした。
We played the tengu haiku game at the party and all had a great laugh.
Compound of 天狗 (tengu, a mythical creature) and 俳諧 (haikai, comic linked verse). The name likely derives from the unpredictable, playful nature of the game, akin to tengu mischief.