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general::
Phrase(s): 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.
McGrawhill's American Idioms And Phrasal Verbs