David says to Jane: "Wow, that John is a really boring guy to hang out with."
(...at that moment, John walks into the room, accidentally hearing the conversation between David and Jane.)
Is there a word for these situations when you trash talk someone that unintentionally/by accident hears what you are saying about him/her?
Edit: added a Family Guy clip for extra context/explanation: https://youtu.be/5GwAHEgOxuU