Instead of "cheese" or "all-in" they use "pil-sal-gi" which means ace/joker card
That’s a really interesting one to me! One thing I’ve noticed is that Koreans do not seem to have the same hangups / negative attitude towards cheese strategies as westerners do!
As far as I can tell, there's no hang up about 'cheese' at the higher levels of competition even among westerners. But that might just be from the extreme Korean influence at that level?
The attitude seems to be that throwing in the occasional cheese is not so much meant to win the game, as it is meant to make sure your opponent wastes resources on defending against a potential cheese at all the other times.
This is very similar to the function of a bluff in a theoretical analysis of poker. Very simplified, the optimal frequency of bluffing is when bluffing just about breaks even against optimal play from your opponents. But throwing the bluffing in masks when you actually have good cards.