Relevant cultural context from Germany:

In Germany, there exists a popular children's game named "Das verrückte Labyrinth" (in English it's simply named "Labyrinth": https://en.wikipedia.org/wiki/Labyrinth_(board_game) ).

When you get a corner-shaped card (in German: "Eckkarte")

> https://boardgamegeek.com/image/155268/labyrinth

from the turn of the previous player, your intended move will typically be more complicated to visualize (at least for children) - this is what this game is about - so children tended to name a "Eckkarte" an "Ätschkarte".