transitive verb
1. : to revive or refresh knowledge of : recall
rubbed up his Latin in an epitaph for the tomb of some pet dog — Virginia Woolf
2. : to improve the keenness of (a mental faculty)
have begun a course of history … to rub up my memory before I touch on classic ground — Sydney Morgan
3. : to daub (a lithographic stone or plate) with ink preparatory to proofing or running