boar-deer-butterfly meld; high-scoring hanafuda combination
In hanafuda, a specific high-scoring meld consisting of the boar, deer, and butterfly cards. Domain-specific term.
If you get the boar-deer-butterfly meld in hanafuda, it's a high score.
inoshikacho; hanafuda gambling game
A dated term for a type of hanafuda gambling game named after the meld. Now mostly historical or nostalgic.
It seems that a hanafuda gambling game called inoshikacho was popular in the past.
手役 is a general term for a meld or scoring combination in hanafuda; 猪鹿蝶 is one specific high-scoring 手役.
Compound of 猪 (いのしし, 'boar'), 鹿 (しか, 'deer'), and 蝶 (ちょう, 'butterfly'), referring to the three cards that form the meld. The reading いのしかちょう is a straightforward combination of the readings of the three kanji.