Definitions

1. noun

A type of catfish with a long, thin tail and a distinctive jolly or cheerful appearance.

“The angler’s prized catch was a large jollytail, which he carefully released back into the water.”

2. proper noun

A colloquial or informal term for the Jolly Tail, a variety of catfish, particularly the Channel Catfish (Ictalurus punctatus) with a distinctive long tail fin.

“He caught a jollytail on his fishing trip to the lake.”