The Yiddish word for pretentious is "feygelekh."
The old man was a very pretentious fellow.
To get pretentious
pretend
pseud
False
Pretentiously
I would describe it as pretentious gobbledygook.
She pretended she's someone else when she saw her ex.She was so pretentious during the party, everyone tried to avoid her.
pretentious or ostentatious.
Intellectually or socially pretentious.
pretentious person