To illustrate the silliness of this thread, on a Glock, the slide "lock" is the bar that traverses the frame, held up by the slide lock lock spring, that serves to keep the slide attached to the frame. It's the part you pull down after after pressing the trigger and pulling the slide back a bit in order to remove the slide from the frame.
The slide "stop," on the other hand, is a lever activated manually by either the user or the magazine follower which causes the slide to lock back after the last round is fired. It is not designed to be used to manually move the slide forward, but many people do (including the FBI).
Call 'em what you want. Doesn't make you smarter or dumber. Just means you probably haven't been to armorer's school. Or if you have been, you just don't care that much about it.