We've found 3 phrases for skeptic (0.131 seconds):

grain of salt »    A bit of common sense and skepticism. Generally used in some form of to take with a grain of salt.

if pigs had wings they would fly »    (colloquial) Expresses speakers skepticism toward a hypothetical argument by another.

take a dim view of »    To dislike; to regard with skepticism, disbelief, disfavor, etc.

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