To act as a patron to
To treat in a superciliously indulgent manner
To trade with
To assume a condescending attitude
Every time one of you opens your mouth, you patronize me.
Don't patronize me, Carmen.
Apply for a card that can be used at the gas station you patronize frequently and that will also provide you with a generous fuel discount.
If you are a loyal online shopper, you may be eligible for special web-only discounts or special sales and promotions from the merchants you patronize.
Learn, before you purchase a policy, if you can choose any dentist or if you'll be required to patronize a network dentist.