An idiom is a word or phrase that is not taken literally. Examples: #1 A chip on your shoulder - means you are holding a grudge #2 Sick as a dog - means you are very ill #3 Rub someone the wrong way - meaning to annoy or bother #4 Pay the piper - means you need to face the consequences of your actions

An idiom is an expression that can be understood only as a whole and not by analysing its constituent parts. (Stack Exchange) 4 Examples of Idioms: - “add fuel to the fire”- whenever something is done to make a bad situation even worse than it is. - “blue moon”- a rare event or occurrence. - “smell a rat”- to detect someone in the group is betraying the others. - “hit the road”- to leave. Source: http://thewordcollector2.tumblr.com/post/40315217807/all-about-idioms Further Reading: Top 10 Most Common Idioms in English- https://voxy.com/blog/index.php/2012/02/top-10-most-common-idioms-in-english/