peacock
noun
the male of the peafowl distinguished by its long, erectile, greenish, iridescent tail coverts that are brilliantly marked with ocellated spots and that can be spread in a fan.
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To the dismay, no doubt, of parents in the house, multitudes of very small fans are singing the lines back at her, and bobbing their heads peacockishly.
From The Guardian ● Mar. 18, 2011