Top definition
Someone who always drinks too much and whose life is falling apart because of it. ... Some people seem to be just fine even though they abuse alcohol. Experts call these people “functional” or “high-functioning" alcoholics."
Even though we never see Sarah sober, it doesn't get in the way of her life.

Sarah being a high functioning alcoholic has a sucessful life, job, and family.
by Kenztenz July 30, 2017
Get the mug
Get a High functioning alcoholic mug for your sister-in-law Beatrix.