The language peculiar to a people or to a district, community, or class
Idiom:
know a thing or two (about someone or something)
Meaning:
to be well informed about someone or something
Example:
My father works in a software company and he knows a thing or two about computers.
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.