I learnt the term swindle from my early chess days. Any form of deceit that changes the game is a swindle. Your example is also a legitimate move. The opponent rushed and lost. He exploited the time factor. My first example in this post, my opponent exploited my lack of focus and won. I wasn't even in time trouble.

To explain the term. Here is a wikipedia link

https://en.m.wikipedia.org/wiki/Swindle_(chess)

Thanks for stopping by