(1) - Dandy (n.) A dandy roller. See below. (2) - Dandy (n.) A small sail carried at or near the stern of small boats; -- called also jigger, and mizzen. (3) - Dandy (n.) A sloop or cutter with a jigger on which a lugsail is set. (4) - Dandy (n.) One who affects special finery or gives undue attention to dress; a fop; a coxcomb.