(entomology) An insect of the order Hemiptera (the “true bugs”). / Any of various species of marine or freshwater crustaceans; e.g. a Moreton Bay bug, mudbug.

(informal, transitive) To annoy. / (informal, intransitive) To act suspiciously or irrationally, especially in a way that annoys others.

A river flowing northwest 450 miles between Belarus and Poland. / A river in Ukraine (Southern Bug), flowing 530 miles to the Dnieper estuary.

(slang) A Volkswagen Beetle car.

(slang) A Bugatti car.

plural of bug

Third-person singular simple present indicative form of bug

(slang) Crazy; unstable.

plural of Bug

present participle of bug