Idioms
Idioms are phrases which cannot be understood simply by looking at the meaning of the individual words in the phrase.
Idiom:
play dumb/ignorant
Meaning:
to pretend to be ignorant about something
Example:
I played dumb when my boss asked me if I knew anything about the problems with the printer.
List of common idioms, their meanings and examples of their usage in sentences
The language peculiar to a people or to a district, community, or class