The phrase "flip through" refers to the act of rapidly turning the pages of a book or magazine, usually to quickly browse its contents. The antonyms for "flip through" would therefore be the opposite actions of taking one's time, reading thoroughly, or carefully examining the material. Such antonyms could include phrases such as "read in-depth," "peruse closely," or "scrutinize meticulously." Whereas "flip through" suggests a casual or superficial engagement with the text, its antonyms connote a more serious, attentive or analytic approach. Therefore, depending on the context and purpose, readers may choose to either "flip through" or carefully consider the material in front of them.