河底撈魚ほーていらおゆい

also: ホウテイラオユイ

Meanings

1

win on the last discard of a round

Mahjong term: winning by drawing the last discarded tile of the round, often considered a lucky or dramatic finish.

from Chinese hé dǐ lāo yú

彼かれは河底ほーて撈魚いらおゆいで逆ぎゃく転てん勝しょう利りを収おさめた。
He won a come-from-behind victory with a win on the last discard.
河底ほーて撈魚いらおゆいは滅めっ多たに起おこらない役やくだ。
Winning on the last discard is a rare hand.