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swallow hook, line, and sinker

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swallow something hook, line, and sinker

Fig. to believe something completely. (These terms refer to fishing and fooling a fish into being caught.) I made up a story about why I was so late. The boss swallowed it hook, line, and sinker. I feel like a fool. I swallowed her lies hook, line, and sinker.

See also: and, sinker, swallow