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?
Slightly morbid academic one.
My computer science professor (who is from Eastern Europe) was explaining an algorithm that he and another professor (from South America) developed. The algorithm processes a graph by first creating a “frame” around it. Since English was not the first language for either of them, the first word they thought of was karkas (каркас, frame in Russian). English word “carcass” sounds pretty much the same, right? but only later, after the work was submitted, they realized they were creating a dead body around the graph.