the.com/pompous
Self-importance so inflated it could double as a parade float.
means Behaving with grand, arrogant self-importance, treating ordinary moments as occasions to impress.
from From Latin pompa, a ceremonial procession — the actual showy parade that gave self-display its name.
Same rootShares ancestry with the word pomp itself.
Procession pastOriginally described literal pageantry, not personality.
Volume tellOften louder in tone than in substance.