READ CASUALLY is a term used to describe the act of reading without focusing too much on the details. LEAF, PERUSE, and SKIM are all words that can be used to describe this type of reading. Leafing through a book or document means to quickly flip through the pages without taking in the content. Perusing is similar to leafing, but it involves taking more time to look at the content. Skimming is the act of quickly scanning the text for key points or ideas. All three of these words can be used to describe the act of reading casually.