"air-breathing" is a common term for engines that use oxygen from the ambient air instead of from a tank - also people do this too. In this case though, it's just using the air as reaction mass though. Space begins at a lower altitude than the atmosphere ends so even a space-craft can be air-breathing, in principle, at least.
Is your complaint that it's only been allocated funding and doesn't actually exist yet? That's a bit of a stretch for click-bait. It's still an unusual type of vehicle.
Turns out an engine can be air-breathing even it it doesn't burn fuel with the oxygen from the air, but just uses it as reaction mass so this concept would still be air-breathing if it existed.
