a break in a relationship where one person (or both) wants to stay away from the other for a period of time to find out who they are, to clear things up, or anything else. They usually end up with broken relationships, and there's a chance of never getting back together, depending. Temporaries are usually a soft way of saying "it's over."
Boy: Look, I think we need to take a temporary break up.
Girl: Screw it, just break it off for real.