VincentYu comments on The Relevance of Advanced Vocabulary to Rationality

[VincentYu]

obstropolous

So, obstreperous is an actual word, that means something very similar.

The OED has an entry on “obstropolous” adj.:

Etymology: Humorous alteration of “obstreperous” adj.

Chiefly humorous and regional. Now rare.

There’s also an entry on “obstropolos” n., which was a nonce word coined by James Joyce for Ulysses:

Etymology: Alteration of “obstropolous” adj., perhaps after ancient Greek -ος, ending of masculine singular nouns, probably also with punning reference to classical Latin ōs mouth (see “oral” adj.).

An obstreperous mouth.