Back before flexible web layouts or modals were a thing, we went through a phase of opening a new browser window for some content, and locking the size. Sometimes we'd want to open multiple windows and reference them later on, so we had a naming convention like "_popup_a" and "_popup_b". We had an intern one summer who coded all of his new window calls as "_poopup_X". I have no idea how the client actually found it, but boy did we hear about it.