An idiom is a widely used saying or expression containing a figurative meaning that differs from the phrase's literal meaning.
throw oneself at (someone's) feet
to behave in a very humble and contrite manner
I threw myself at the manager's feet and apologized for the mistake that I had made.
List of common idioms, their meanings and examples of their usage in sentences
An idiom is a group of words, or in other words, a phrase that has a meaning different from the literal meaning of the words in it.