The language peculiar to a people or to a district, community, or class
Idiom:
driving force behind (someone or something)
Meaning:
the motivating force behind someone or something
Example:
The potato farmers were the driving force behind the efforts to get people to eat more potatoes.
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.