nipper(noun) noun1. a young person of either sexSimilar word(s): child, fry, kid, minor, nestling, shaver, tiddler, tike, tyke, youngsterDefinition categories: person, juvenile2. a grasping structure on the limb of a crustacean or other arthropodsSimilar word(s): chela, claw, pincerDefinition categories: animal, appendage, extremity, member