A study or work session that goes through the night; studying without sleep (usually a last-minute course of action).
The term is popular with college students who spend the night before an exam studying (or 'cramming'), trying to learn a lot of material in a short period of time. The term is frequently used in the phrase 'pull an all-nighter'.
1) We pulled an all-nighter to finish the report.
2) I pulled an all-nighter to study for my math exam.
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