Pulling an all-nighter is a common practice among students who need to CRAM for an upcoming exam or finish a project. It involves staying up all night to STUDY and complete the task at hand. The two crossword solutions, CRAM (4 letters) and STUDY (5 letters), are both activities that one would do while pulling an all-nighter. Cramming is the act of quickly memorizing information in a short amount of time, while studying is the act of reading and understanding the material. Both activities are necessary when trying to pull an all-nighter.