Source : WordNet®

twirp
     n : someone who is regarded as contemptible [syn: {twerp}, {twit}]
     v 1: make a weak, chirping sound; "the small bird was tweeting in
          the tree" [syn: {tweet}]
     2: make high-pitched sounds; of birds [syn: {peep}, {cheep}, {chirp},
         {chirrup}]