no one will be (any) the wiser

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.See also: no, one, will, wiser