Source : WordNet®

tweet
     n : a week chirping sound as of a small bird
     v 1: make a weak, chirping sound; "the small bird was tweeting in
          the tree" [syn: {twirp}]
     2: squeeze tightly between the fingers; "He pinched her
        behind"; "She squeezed the bottle" [syn: {pinch}, {squeeze},
         {twinge}, {nip}, {twitch}]