swallow hook, line, and sinker

swallow (something) hook, line, and sinker

To believe completely and unquestioningly that something is true, especially that which is deceitful, misleading, or untrue. I told them that I like this stupid school, and they swallowed it hook, line, and sinker—I guess I'm a pretty good actress. I can't believe they swallowed his stupid story hook, line, and sinker.
See also: and, sinker, swallow
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

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
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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