Idiom fromatin: idioma, "special property' is an expression, word or phrase that has a figurative meaning, this is separate from theiteral meaning or definition of the words of which it is made. Word group becomes an idiomatic expression. The words develop a specialized meaning as an entity, as an idiom. When a speaker uses an idiom, theistener might mistake its actual meaning, if he or she has not heard this figure of speech before. In English the expression to go round the bend, would mean "to go insane'. There are many such idiomatic expressions, A Curtainecture: Nagging by a wife at bedtime. A Dutch Wife: A bolster.and of Nod: A state of sleepet not idioms confuse those unfamiliar with them.ittle Red Book of Idioms and Phrases will add to your vocabulary.et's get into the ball park of idioms and phrases.