This document defines and provides examples for common idiomatic expressions in English. It includes idioms such as "red letter day" meaning an important day, "Achilles' heel" referring to a weakness, "abounds in" meaning exists in great numbers, "creature comforts" referring to modern conveniences, "chip off the old block" describing someone resembling a parent, "under a cloud" meaning distrusted, "between two fires" facing conflict from two sides, "keep abreast of" meaning to stay informed, "nodding acquaintance" referring to a slight familiarity, and "rumors in the air" meaning ideas felt to be circulating. Examples are provided for each idiom to illustrate