1) Commonly, someone who is a repeat user of a product or service, regardless of the nature of the business.

2) In healthcare, someone who is frequently showing up for similar injuries or disorders. Often, this is applied specifically in the world of drug and alcohol rehabilitation (rehab) to somebody who has tried to get sober (clean up or dry out) but has had frequent relapses. According to current statistics, the majority of addicts (80%) are likely to relapse after the first try.

when you got that sauce that's lookin extra fire.

Someone who is constantly high on cheap or unreliable drugs, such as Pot or Crack

Someone who you end up going home with after every party.

Somebody who uses class A drugs often.

i.e is frequently flying

Someone who has a lot of patience to go through airport security numerous amounts of times.

Someone who is constantly calling the police for the most ignorant or tedious reasons. Typically calls when no emergency exists.