English example sentences with "dead giveaway"

You can't seriously expect that they won't recognize you in that disguise. That lopsided, dime store moustache is a dead giveaway!
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Four or five pens in one's shirt pocket is a dead giveaway for a nerd.
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It's a dead giveaway.
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He said that English was his maternal language, but his accent was a dead giveaway.
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That disguise is a dead giveaway! Choose something less obvious.
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