Hellacopter hel-La-cope-ter noun 1. An aerial conveyance invented, produced, or sited by a Californian. "To the typical Californian there are two kinds of airborne body: the hellacopter which they know and the UFO which is, by virtue of even using the term- Unidentified, but which they will still speak of at great length." -Ale, Margaret. "Anthroapologies".