know which side bread is buttered on

(redirected from know which side bread is buttered)
Also found in: Dictionary, Thesaurus, Medical, Encyclopedia.

know which side one's bread is buttered on

Prov. to be aware of where your money comes from; to be loyal to the person or thing that will benefit you the most. Wife: Please be sure not to upset Grandma. You know we can't do without the money she sends us every month. Husband: Don't worry. I know which side my bread is buttered on.
See also: bread, butter, know, on, side