The language peculiar to a people or to a district, community, or class
Idiom:
fine print
Meaning:
the part of a document that you cannot easily notice because of the small size of the print but which often contains very important information
Example:
I read the fine print on the contract before I signed it.
List of common idioms, their meanings and examples of their usage in sentences
An expression in the usage of a language that is peculiar to itself either in having a meaning that cannot be derived from the conjoined meanings of its elements or in its grammatically atypical use of words.