[DZ]

Originally Posted by fishgolf

Ran into this... was curious from the question.

https://fishinghistory.blogspot.com/...word-plug.html

Good stuff. Like the article mentions I'm pretty sure the term began in freshwater fishing. I have an old copy of Tackle Craft by C. Bord Pfeiffer and it has a very expansive chapter about plugs, even carving your own with a pocket knife.