Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Origin: gad 'pointed stick' (13-19 centuries) (from Old Norse gaddr) + FLY2

gadfly

 noun
     
Related topics: Insects
gad‧fly plural gadflies [countable]
1 someone who annoys other people by criticizing them
2TAHBI a fly that bites cattle and horses
Definition from the Longman Dictionary of Contemporary English
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