I just got to think it after checking Saki’s hand on the episode 18 (it’s tsumo rinshan kaihou (1), tanyao (1) toitoi (2) sananko (2) sankantsu (2) btw – 8 han aka baiman) – when Kurogane said the earlier (low point) hands are called trolling.
Feeling the similarities with a card game I used to play, I looked it up at the central of fast knowledge fix and found this. Rummy. I think I used to call it remi (few years ago until I reminded/bothered to look it up today).
Yes I liked to troll in that game :>
And apparently it’s also related to canasta, a card game I often heard and usually played by someone (or sometwo) at home when having, um, gathering, LOL. IYKWIM.