BUG

noun

1. An insect of the order Hemiptera (the “true bugs”).
2. Any of various species of marine or freshwater crustaceans; e.g. a Morton Bay bug, mudbug.
3. Any insect, arachnid, or other terrestrial arthropod that is a pest.

verb

1. To annoy.
2. To install an electronic listening device or devices in.

noun

1. A microfossil, particularly a foraminiferan.