roll on verb 4exclamation 1roll-on noun 2roll-on adjective 1forms 4 verb4 •To pass; to go on; to elapse. •To continue to move forwards. •To load or apply something with a rolling motion.He rolled on some deodorant, threw on a shirt, and ran out the door.He rolled on some paint, slapped up a "wet paint" sign, and called it a day. •(slang) To snitch or tattle (on a person or group), to reveal a secret under pressure, usually regarding criminal matters. exclamation1 •Used to express anticipation.Roll on, summer! roll-on noun2 •A cosmetic product (especially a deodorant) applied by means of a ball at the head of a container, which rolls the product on to the skin etc.I never minded aerosols. But in the interests of the environment, I changed to roll-ons. — 1999 •[in the plural] (old-fashioned) A type of corset which is rolled on to the body.Roll-ons and lastex^([sic]) corsets in tube form were a lighter type of corset mostly worn by young women and under summer clothes. — 1997 roll-on adjective1 •Applied by means of a ball that can be rotated to pick up liquid from the inner reservoir. formsrolled on · rolling on · rolls on · roll-ons