Bombardier beetle
WordNet
noun
(1) Beetle that ejects audibly a pungent vapor when disturbed
WiktionaryText
Noun
- A beetle whose defence mechanism enables it to eject a hot aqueous mixture of chemicals at predators. They come from a number of subfamilies: Carabinae (e.g., Brachinus crepitans), Metriinae (e.g., Stenaptinus insignis) and Paussinae (e.g., Goniotropis nicaraguensis).