满口之乎者也

滿口之乎者也
mǎnkǒuzhīhūzhěyě
  1. mouth full of literary phrases
  2. to spout the classics

CEDICT

Entry Composition

1 满口 mǎnkǒu
  1. a full mouth of (sth tangible)
  2. to have the mouth exclusively filled with (a certain language, lies, promises etc)
  3. (to agree etc) unreservedly
2 之乎者也 zhīhūzhěyě
  1. lit. 之 zhī, 乎 hū, 者 zhě and 也 yě (four grammatical particles of Classical Chinese) (idiom)
  2. fig. archaic expressions