Yes that is a technical term ;)
Years ago, I had a spray by Umberto Gianni that was totally ace. You squirted a bit onto dry hair the day after styling it, if it had gone a bit flat. Then they discontinued it and I've never been able to find anything like it. Everything I've tried adds weight to my hair and makes it even flatter, or just plain greasy.
I can get a similar result by walking in a certain kind of drizzle. I guess I'm looking for drizzle in a bottle! Anyone got any recommendations?