cheat sheet

noun
🔊/ˈtʃiːt ʃiːt/
🔊/ˈtʃiːt ʃiːt/
(informal)
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  1. a set of notes to help you remember important information, especially one taken secretly into an exam room备忘纸条;(尤指考试用的)作弊纸条,夹带 synonym crib sheet