Idioms
An idiom is a type of phrase or expression that has a meaning that can't be deciphered by defining the individual words.
Idiom:
spook (someone)
Meaning:
to startle or surprise someone
Example:
The loud thunder and lightning spooked the horse.
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