An example of what I mean:
I, in China, told an English speaking Chinese friend I needed to stop off in the bathroom to “take a shit.”
He looked appalled and after I asked why he had that look, he asked what I was going to do with someone’s shit.
I had not laughed so hard in a while, and it totally makes sense.
I explained it was an expression for pooping, and he comes back with, “wouldn’t that be giving a shit?”
I then got to explain that to give a shit means you care and I realized how fucked some of our expressions are.
What misunderstandings made you laugh?
I’ve never had that sort of thing while personally interacting with people who speak other languages. However, when deployed I used to hear people speaking other languages regularly. So it wasn’t that they were communicating directly with me, but I used to love overhearing what they were saying and “bad translating” it to english. And that was hilarious.