adj. impervious to grease. greaser n. slang member of a gang of youths with long hair and motor cycles. greasy adj. (ier, lest) 1 a of or like grease. b smeared or covered with grease. c containing or having too much grease. 2 a slippery. b (of a person or manner) unpleasantly unctuous. greasily adv. greasiness n.
