A crib note is a cheat sheet that provides quick reference to information that one needs to remember. There are several synonyms for the term that can be used interchangeably. Some of the most popular ones include cheat sheet, study guide, reference tool, memory aid, exam notes, revision notes, summary notes, study notes, and study aid. These synonyms come in handy when one needs to keep their knowledge fresh and has a limited amount of time to devote to studying. They are often used by students to pass tests, professionals to recall essential information, or anyone who needs to keep quick notes for future reference.