Synonym: bozo, fathead, goof, goofball, goose, jackass, twat, zany. Similar words: beckon, pick off, pick out, kick off, reckon, back of, lock out, back out. Meaning: ['kʊkuː] 
n. 1. a man who is a stupid incompetent fool 2. any of numerous European and North American birds having pointed wings and a long tail. v. repeat monotonously, like a cuckoo repeats his call.
n. 1. a man who is a stupid incompetent fool 2. any of numerous European and North American birds having pointed wings and a long tail. v. repeat monotonously, like a cuckoo repeats his call. 
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91 She said that was good, and for some reason she said we needed a new cuckoo clock.
92 The Bow-wow theory sees primitive language as an imitation of natural sounds, such as the cries of animals, like quack , cuckoo .
93 In Scotland, April Fools Day is 48 hours long and you are called an "April Gowk", which is another name for a cuckoo bird.
94 The cuckoo explained with disdainfulness, "It's literally a waste of time and stupid to stay in the nest and hatch eggs.
95 We have been surrounded by birds all our lives, yet so feeble is our observation that many of us could not tell whether or not the chaffinch sings, or the colour of the cuckoo.
96 The just-hatched cuckoo, still blind and featherless, has a special hollow like a dimple on its back, so that it can hump out of the nest, one by one, its companion fledglings.
97 The mellowness of the cuckoo report the come of spring.
98 Don't think he is a cuckoo(http://Sentencedict.com), he's pretty smart indeed.
99 They will protect species including sponges, sea squirts, corals, shellfish, and more exotic creatures such as the colourful cuckoo wrasse fish.
100 I thought I was hearing things yesterday. I thought I heard a cuckoo.
101 In front of the deserted flat hang a cuckoo clock without battery, for so many years both the clock and the flat remained there, unattended, but this perhaps is a very good setup for a fairytale?