drink off(redirected from drank it off)
To drink something very quickly, especially in a single gulp. A noun or pronoun can be used between "drink" and "off." The man drank off the whole pint of ale in one go. The doctor gave the vial of medicine to the patient, who drank it off without question.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.