swallow the dictionary
To speak using long or obscure words.
I swear, I don't know where you get all this swallowing the dictionary business!” - He himself never read anything but the ticker and the sporting news.
ADJ
comprehensive, good | electronic, online | picture | pocket | English, French, etc. | English/French, French/English, etc. | bilingual, monolingual | learner's, native-speaker | standard | specialist, technical | collocation, etymological, historical, pronunciation
biographical, encyclopedic, medical
She bought an encyclopedic dictionary to help her understand unfamiliar words while reading.
VERB + DICTIONARY
consult, look sth up in, use
When you encounter an unfamiliar word, you should consult a dictionary to find its meaning.
compile, write | edit | publish
DICTIONARY + NOUN
definition, entry
PREP
in a/the ~
When you don't know what a word means, you can look it up in a dictionary.