Question

This is a phrase in common use that can not understand by literal or ordinary meanings

Answer 1

Answer: IDIOMS OR COLOQUIAL EXPRESSIONS!.

Explanation: First of all we need to acknowledge the fact that LANGUAGES are the form of how a population and all their habitants express and communicate with other.

But as every existing thing, there are variants. Expressions that only a determinate population that speaks a determinate language can understand. We call these IDIOMS/COLOQUIAL EXPERESSIONS.

Answer 2

Idioms would be the phrase that can't be understood by literal or ordinary meanings. Idioms are a group of words that have a meaning, but can't be understood.