have more holes than Swiss cheese

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have more holes than Swiss cheese

To be extremely unsound or flawed. Does anyone have a better suggestion? Mark's idea has more holes than Swiss cheese.
See also: cheese, have, hole, more, Swiss
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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References in periodicals archive ?
An insult to longsuffering viewers' intelligence, this homecoming storyline had more holes than Swiss cheese.
The plot had more holes than Swiss cheese but who cares when the dialogue was sparkling and Auld Reekie was shining like a new pin?