rub up on

Advanced (C1) neutral

to practice or study something again so you remember it better

"I need to rub up on my German before the trip to Berlin."

Related phrases

rub along rub away rub down rub in rub it in rub off rub off on rub one off

More with "up on"

beat up on check up on creep up on follow up on gang up on hook up on load up on pick up on
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