n. a great big lie. (Like the fisherman who exaggerates the size of the fish that got away.)
That's just a fish story. Tell me another!He's a master at the fish tale. Maybe he should be a politician.
a fish tale
A big lie. The phrase alludes to the tendency of fishermen to exaggerate the size of the fish they've caught or lost out on. I'm sure Grandpa is just telling you a fish tale—there's no way all of that's true!