cuckoo Meaning, Definition & Usage

  1. noun a man who is a stupid incompetent fool
    goof; fathead; goose; bozo; zany; twat; jackass; goofball.
  2. noun any of numerous European and North American birds having pointed wings and a long tail
  3. verb repeat monotonously, like a cuckoo repeats his call

WordNet

Cuck"oo noun
Etymology
OE. coccou, cukkow, F. coucou, prob. of imitative origin; cf. L. cuculus, Gr. , Skr. kkia, G. kuckuk, D. koekoek.
Definitions
  1. (Zoöl.) A bird belonging to Cuculus, Coccyzus, and several allied genera, of many species. ✍ The European cuckoo (Cuculus canorus) builds no nest of its own, but lays its eggs in the nests of other birds, to be hatched by them. The American yellow-billed cuckoo (Coccyzus Americanus) and the black-billed cuckoo (C. erythrophthalmus) build their own nests.

Webster 1913