Fadicious
When someone uses a fancy word to sound like a genius, even if it’s total nonsense, just so they can impress people for a few days before everyone forgets it.
He used the word ‘fadicious’ in his essay and got a B+ because the teacher didn’t know what it meant.
She texted me ‘I’m fadicious today’ and I thought she had a mental breakdown.
The kid said ‘I’m fadicious now’ and nobody believed him.