Metaphor Metaphors are figures of speech that compare how two nouns which are not alike in most ways are similar in one important way. Unlike similes, metaphors don't use "like" or "as" in the comparison. Metaphors are a way to describe. Authors use them to make their writing more interesting, and entertaining.
Examples: We would have had more pizza to eat if Tammy hadn’t been such a hog. Cindy was such a mule. We couldn’t get her to change her mind. Such statements are not literally true but give readers a much more interesting picture as they read. Obviously, Tammy doesn’t have a snout or curly tail, and Cindy doesn’t nay. However, the author of these sentences has made a comparison pointing out how each girl is similar to a hog and a mule. What is the author literally saying about Tammy? How about Cindy?
This Is Your Brain on Drugs was a large-scale US antinarcotics campaign by Partnership for a Drug-Free America (PDFA) launched in 1987, that used a very memorable metaphor comparing the brain on drugs to a fried egg. This is your brain; this is your brain on drugs.