any of several tropical marine birds of the genus Sula: family Sulidae, order Pelecaniformes (pelicans, cormorants, etc). They have a straight stout bill and the plumage is white with darker markings Compare gannet
C17: from Spanish bobo, from Latin balbus stammering
1590s, from Sp. bobo "stupid person, slow bird" (used of various ungainly seabirds), probably from L. balbus "stammering" (like barbarian, from an imitative root, cf. Czech blblati "to stammer," Skt. balbala-karoti "he stammers"). Booby prize is 1889, an object of little value given to the loser of a game; booby trap is 1850, originally a schoolboy prank; the more lethal sense developed during World War I.