Found 2 items, similar to Boat bug.
English → English (WordNet) Definition: boat bug boat bug n : carnivorous aquatic bug having paddle-like hind legs [syn: water boatman ]
English → English (gcide) Definition: Boat bug Boat bug \Boat" bug`\ (Zo["o]l.) An aquatic hemipterous insect of the genus Notonecta; -- so called from swimming on its back, which gives it the appearance of a little boat. Called also boat fly, boat insect , boatman, and water boatman. [1913 Webster]