white magic

black-and-white

Classifying people, objects or concepts as two polar opposites, especially "right" and "wrong"; dichotomous and inflexible.

magic asterisk

an unspecified future budget cut, especially an imaginary cut.

magic box

Television.

magic bullet

A simple remedy for a difficult or complex problem, especially a cure for a disease.

magic touch

An ability or skill to produce highly favorable results in an impressive way.

wash a blackamoor white

To labour in vain, especially so as to present something as better than it really is; to whitewash.

white bread

Bread made from white flour.

white coat hypertension

Elevated blood pressure measured by a medical practitioner and deemed to result from the patient's emotional response to the medical environment.