Ah, Gaijin Smash… Well, I guess I can explain it in the form of a personal story.
Last year, I was at an Onsen with Luke, Masako, and our good friend Louis. After we got out, we all went to the milk machine to get some delicious strawberry milk. As I was fishing in my pocket for my coin pouch, an attendant came up to me, pointed to the locker key on my wrist, and told me that I wasn’t supposed to put that in the coin slot. He told me all that in Japanese! I didn’t mind at all. I thought it was very cute that he thought I was such a stupid gaijin that I’d put my key in the coin slot to get a drink. Even more cute, he explained it all to me in Japanese!
So, Gaijin Smash is the art of taking advantage of their super-low expectations of our intelligence.
Personally, I like doing what I can to fit into the culture, as it feels very natural to me already. But I still enjoy a funny Gaijin Smash story.
(Our last trip was documented here, btw)