stinkbug

noun

1. Insects, usually shield-shaped, that possess a gland that produces a foul smelling liquid, usually containing aldehydes which they use to discourage predators.

2. (entomology) A common name applied to various insects of the Hemiptera order (the "true bugs"), in the Heteroptera suborder, principally in the superfamilies Pentatomoidea and Coreoidea.

3. (US Southwest) A pinacate beetle or stink beetle (genus Eleodes) that releases a pungent odor when threatened.