Source : WordNet®

pick at
     v 1: pluck or pull at with the fingers; "She picked nervously at
          the buttons of her blouse" [syn: {pluck at}, {pull at}]
     2: eat like a bird; "The anorexic girl just picks at her food"
        [syn: {peck at}, {peck}]
     3: express a negative opinion of; "She disparaged her student's
        efforts" [syn: {disparage}, {belittle}] [ant: {flatter}]