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Noun; Word used by sport-fisherman to describe an enormous catch. A boss fish is usually at the top of the food-chain, meaning that there is no other fish in the area that would dare contend with it. When a fish slams on an angler's line and it is clear that the animal is not an ordinary fish, it is obvious that the fish is a boss. On occasion, the fish comes in slowly and it is unclear whether or not the fish is a boss. Once the fish is actually witnesses, it can be determined if it is a boss.
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