rub up verb 8rub-up noun 5forms 5 verb8 •To polish or scrub; to cover (something with a substance) by rubbing.I rubbed up the brass buttons on my jacket to make them shine.The pitcher rubs up the new baseball with dirt to get a better grip. •To rub on someone or something.The cat rubbed up on my legs. •To rub (a body part): to massage, give a massage to.[…] every Morning when you Comb your head, dip a sponge in this water and rub up your Hair, and it will keep it clean and preserve it, — 1674 •To create (something) by rubbing.The new shoe rubbed up a blister on the back of his foot. •(informal, old-fashioned) To revive one's knowledge of (something); to renew (a skill).I must rub up my balancing, and chasing, and boring. — 1775 •(US, slang) To assault (someone).There was a lot of yelling and gesticulating, and a few blows were passed. A couple of guards got rubbed up a little. — 1952 •(no longer used) To excite or awaken (something); to revive or reawaken (something).to rub up the memory; to rub up old sores •(no longer used) To reduce (something) to a powder or paste using friction (with a mortar and pestle, for example); to mix (with something) using friction.to rub up pigments with water or oil rub-up noun5 •The action of rubbing, for example polishing or massaging.[…] Ben laid them [the knives and forks] side by side, counted them, and finding the number agree with his guests, said, “They’ll dow capital when they’ve had a bit of a rub up.” — 1841 •The act of bringing old information to the front of one's memory. •(Caribbean) A party, especially one that is spontaneous and involves music and dancing. •(slang, no longer used) The act of masturbating. •(no longer used) An encounter (with someone).Altogether, it has been a most enjoyable trip to me. As much or as little company as I chose, and a rub up against a number of old acquaintances of all sorts. — 1889 formsrubbed up · rubbing up · rubs up · rub ups · rub-ups