Whippersnapper
Part of speech: noun
Definition: a young and cheeky or presumptuous person
Lightweight
Part of speech: noun
Definition: A boxer in a weight division having a maximum limit of 135 pounds for professionals and 132 pounds for amateurs.A competitive weight division between bantamweight and welterweight, with specific weights varying by organization.One of little consequence or ability.A person who can't handle their drink.A political candidate with little chance of winning
Part of speech: adjective
Definition: Lacking in earnestness, ability, or profundityHaving less than average weight
Example sentence: I would say that Roger Federer is pretty amazing. And Manny Pacquiao - he's such a tiny, little lightweight guy, but the way he fights makes people so excited.