The document defines and provides examples of common idiomatic phrases including "ace in the hole", "albatross around one's neck", "Achilles' heel", "cost an arm and a leg", "put on the back burner", "back to square one", "bad mouth", "bark up the wrong tree". Each idiom is presented with its meaning and origin. The document also provides examples of sentences using the idioms and identifies whether each usage is correct or incorrect.