bluebottles >> /ˈbluːbɒt(ə)l/
Definition: [noun] A common blowfly with a metallic-blue body, the female of which often comes into houses searching for a suitable food source on which to lay her eggs.
Example: Blowflies, such as greenbottles and bluebottles, are attracted to your rabbit and its housing by the presence of faeces, urine, rotting vegetables and open wounds.
Definition: [noun] The Portuguese man-of-war.
Example: I list it along with bluebottles, broken glass, backwash and muggers - the last-mentioned not actually in the surf but lurking in the nearby sanddunes, waiting for an opportune moment to interface with you and your valuables.
Definition: [noun] The wild cornflower.
Example: As a bonus, here are some wildflowers growing next to a field. The red one is a poppy, and the blue ones are cornflowers or bluebottles.
Definition: [noun] A police officer.