something that you say which means that no one will notice something bad that someone has done.
Take the label off the jar and say you made it yourself. No one will be any the wiser.
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no one will be (any) the wiser
No one will notice (that something has been done). The phrase especially refers to a lack of notice of some act that is mischievous, illegal, or unethical. Come have a cigarette with us! Just eat some mints, then wash your hands and face and no one will be any the wiser!No one will be the wiser if you leave out a few of the ingredients.