It’s not about assuming other people know your lingo, it’s about it being the most widely understood phrase with the desired meaning; there isn’t something else

It’s not about assuming other people know your lingo, it’s about it being the most widely understood phrase with the desired meaning; there isn’t something else you would say that’s more clear to more people. You should not assume that the other person will understand it and act immediately, but it’s absolutely the correct thing to say in this scenario. You just also need to slow down to be able to respond if they don’t.