WordNet (r) 3.0 (2006):

peewee
    n 1: disparaging terms for small people [syn: runt, shrimp,
         peewee, half-pint]
    2: small olive-colored woodland flycatchers of eastern North
       America [syn: pewee, peewee, peewit, pewit, wood
       pewee, Contopus virens]