内容はさておき、なにこの物々しい話し方は？

Leaving what it means to one side, what's with the high-falutin' language?

内容(ないよう)はさておき、なにこの物々(ものもの)しい話(はな)し方(かた)は？

Naiyō wa sateoki, nani kono monomonoshii hanashikata wa?

内容 (ないよう)

subject; contents; matter; substance; detail; import

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

さて置く (さておく)

to set aside

何 (なに、なん)

what; how many; you-know-what; that; whatsit; what's the expression; what do you call them; what?; hey!

此の (この)

this (something or someone close to the speaker (including the speaker), or ideas expressed by the speaker)

物物しい (ものものしい)

strict (e.g. security); heavy (e.g. guard); showy; pretentious; ostentatious; overdone; exaggerated; impressive; imposing; pompous; stately; solemn

話し方 (はなしかた)

way of talking; speaking style

Readings: ナイ、ダイ、うち

Meanings: inside, within, between, among, house, home

Readings: ヨウ、い.れる

Meanings: contain, form, looks

Readings: ブツ、モツ、もの、もの-

Meanings: thing, object, matter

Readings: ワ、はな.す、はなし

Meanings: tale, talk

Readings: ホウ、かた、 -かた、 -がた

Meanings: direction, person, alternative