So the other day I was talking to a friend (he's a native speaker by the way). We were talking about a certain subject when I said "How do you call that Gerry?", How do you say when someone is doing this or that and etc..." And every time I'd use "How" he would correct me and say it's "What" not "How", "It's what do you say, what do you call". Why was I wrong? I think many people don't know this.