A speck or stain made by the excrement of a fly; hence, any insignificant dot.
- A small dark speck or stain made by the excrement of a fly.
- A minute or insignificant spot.
- To mark or foul with flyspecks.
- Slang To examine closely or in minute detail; scrutinize: "[The company's] performance will be flyspecked for clues as to how well it will do over the calendar year” ( Harry A. Stark).