Source : WordNet®

kvetch
     n 1: (Yiddish) a constant complainer
     2: (Yiddish) a nagging complaint
     v : express complaints, discontent, displeasure, or unhappiness;
         "My mother complains all day"; "She has a lot to kick
         about" [syn: {complain}, {kick}, {plain}, {sound off}, {quetch}]
         [ant: {cheer}]