What is an acoholic?
An alcoholic is someone who is unable to control the amount of alcohol they consume.  Loss of control with any substance is how addiction starts.  Alcoholism is a form of uncontrolled addiction.  The most dangerous kind of addiction is one where a person is in denial that they have an addiction.  Alcoholism like other additions if not treated can lead to kidney failure and ultimately death in the long run.  It's best if you know someone with an alcoholic addition to try and intervene and get them help through a 12-step or alcoholics anonymous program.