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An attempt to discover information without knowing what it may be. The term implies that the search does not have a specific subject but is rather performed in the hopes that some new information will be found that will be beneficial to the searcher. Primarily heard in US. The defense attorney objected to the vague line of questioning, accusing the prosecutor of engaging in a fishing expedition.
a search for information without knowledge of whether such information exists. (This involves asking questions with no preconceived notion of what the answers might reveal.) The lawyer was on a fishing expedition. There was no real wrong committed to justify a lawsuit. Your honor, the prosecutor is just on a clumsy fishing expedition. I move for dismissal. We are going to have to go on a fishing expedition to try to find the facts.
a fishing expedition(mainly American)
an attempt to discover the facts about something by collecting a lot of information, often secretly The investigators' request for the company's accounts is simply a fishing expedition - they have no real evidence of wrongdoing.
An attempt to find useful information by asking questions at random. For example, The sales force was told to go on a fishing expedition to find out what they could about the company's competitors . This expression was taken up by lawyers to describe interrogating an adversary in hopes of finding relevant evidence and is now used more broadly still. [c. 1930]
n. an exploratory search for facts. (This involves asking questions with no preconceived notion of what the answers might reveal.) The lawyer was on a fishing expedition. There was no real wrong committed to justify a lawsuit.