To mug up on: Quickly memorize Example: I mugged up on biology terms right before the test. To brush up on: Review or refresh knowledge Example: I brushed up on my math formulas before the exam. To put off: Delay or postpone Example: I kept putting off studying until the night before. To put aside Temporarily ignore or save Example: I put aside my distractions to focus on revision. To mess up: Make a mistake Example: I messed up the last question by misreading it. To screw up: Seriously make a mistake Example: I screwed up the whole paper by skipping a section.