The old man shared a fisherman's tale of his biggest catch.
exaggerated account
Frequency:
60
%
His exaggerated account of the fishing trip made it sound like an adventure.
whopper
Frequency:
45
%
She told a whopper of a fish story that had everyone laughing.
Idiomatic Expressions for fish story
Phrase: smell like a fish story
Meaning: to seem suspicious or not entirely believable
Usage: Her explanation for being late smelled like a fish story to me.