a good fish
A good fish is when a guy in a market tries to sell you a fish and says it's so good it'll make your life better and maybe your ex will come back.
The fish salesman called my fish a good fish and said it was going to make me rich.
He told my mom the fish was a good fish and she bought it just to make him happy.
He called my dog a good fish and then my dog ate the whole thing.