I came aross the word bombasity here: http://craigmod.com/journal/digital_physical/
I would argue, however, that for Christo and Jeanne-Claude, the book simply formalized much of what they already knew. Their work benches were covered in schematics, file cabinets filled with correspondence between farmers and governments and architects and textile manufacturers and engineers. In other words — to them the magnitude and grandiose nature of their work was present all around their home, their work space. It manifest physically in those files and papers and cabinets. For them, a monster book like this didn’t illuminate the enormity of their undertaking — they were aware of The Umbrellas’ bombasity every time they opened their studio door.
But don't know what it means. I searched on Google and only found people using it but no explanations, even here: http://www.urbandictionary.com/define.php?term=bombasity
Can somebody give some explanation about it?