A rageaholic (with rageaholism) is a person who is addicted to rageahol or who gets excited by expressing rage, or a person prone to extreme anger with little or no provocation
(or the adjective for that concept). To anger-management groups, a "rageaholic" can be a person addicted to expressing rage (or an "anger addict"), afflicted with a psychological addiction to continual fits of rage. There are 12-step programs for dealing with rageaholics, such as with Rageaholics Anonymous in Los Angeles, CA.
The word rageaholic is patterned after "alcoholic" and "workaholic" or similar names, and the condition is called "rageaholism" (as in "alcoholism").
The term rageaholic is relatively rare compared to the older term "alcoholic": whereas 27 major online dictionaries on the Internet define alcoholic, few define "rageaholic" at all.
Rageaholics can be very dangerous
Unlike the predictable nature of alcoholism, fits of a rageaholic are difficult to predict. There is no obvious bottle of scotch or bottle of tequila along a California highway. Instead of some warning sign (such as continued drinking), at any given minute on any day, a rageaholic can fly into an almost unlimited fit of endless rage, tearing down curtains, pulling "For Sale" signs out of gardens and even ripping down TV dishes with unbelieveable vicious behavior.
Also, little is known about the range of potential triggers: for example, if extra sleep were to cause a rageaholic to express greater hostility, or if drinking/eating particular foods were to trigger more violent behavior, little is known, as to which people might react more violently. A one-hour nap might have little effect; however, several hours of sleep might generate a horrific, vicious tantrum in some people, but the details are just not fully understood.
There is also a category of alcoholic rageaholics, who are addicted to both alcohol and fits of rage. However, a rageaholic can wake up from a long, healthy period of rest, seeming to be perfectly content, and then instantly fly into a violent, hateful, endless tirade of vicious abuse and disgusting hatefulness, without drinking a single drop.
Potential triggers of rage
The Rageaholics Anonymous chapter in Los Angeles, CA (compare with Alcoholics Anonymous), warns of several potential triggers for people who want to control their own tendency toward growing fits of rage: 
Once an alcoholic takes that first drink, their chances of getting drunk increase exponentially. Once a rageaholic expresses their anger, their chances of throwing a tantrum also increase exponentially. Rageaholics Anonymous advises, "Abstaining completely from acting on anger is the only answer for a rageaholic."  The following are things that can be done right now to avoid expressing the anger and opening the door to another rageaholic episode.
Take responsibility: Regardless of what triggered it, acting on the anger is dangerous for everyone around. It is time to stop blaming others for the rageaholism.
Score the anger: Each time they start to lose their tempers, it is useful to score how angry they are on a one-to-ten scale. When they reach a 5 or more, they can try some new behaviors. (See below.)
Stop speaking: When feeling anger increasing, they need to stop talking. This may feel very uncomfortable at first, but talking when becoming angry is the first step to a rageaholic episode.
Walk away: When people get angry and continue to argue, they do things they are sorry for later. It can save a marriage, job or trip to jail to take a break when anger is starting to rise.
Interrupting: The quickest way to escalate a situation is to talk over someone. Even if they interrupted first, concentrating on not interrupting will keep from having a rageaholic episode.
Staring: There is a huge difference between paying attention and glaring. When people stop staring to intimidate, it stops the cycle that escalates internal anger into acting out.
Cursing: This is not a moral point. When people stop using profanity, they stop fanning the fire of their anger.
Name-calling: It is just like cursing. When people stop using demeaning terms (like calling people "stupid" or "crazy"), they stop the expanding cycle of anger that could lead to a rageaholic slip.
Threatening: People use threats to manipulate and control others. A threat usually implies "I will leave you or hurt you." It plays to other's insecurities, usually escalates their feelings and, moreover, takes the anger up a notch.
Pointing: Note the cliché, "When we point at someone else, we have three fingers pointing back at ourselves." There is the opportunity to stop blaming others for anger problems.
Yelling: When people yell, raise their voices, or talk in a mean tone, they fuel their own anger. Many are unaware when they start to raise their voices. People should ask others to respond when the volume is rising and thank them.
Sarcasm: Using sarcasm and mocking others is a way of expressing anger and humiliating people they care about.
Throwing things: When people throw things, slam doors, or bang walls, they intimidate others and escalate their anger. It is time for them to stop physically showing their anger.
Touching: When people touch, hold, or push someone in anger, they are committing a crime. Even if they claim it is self-defense, aggressive touching must stop.
Hero stories: When people recount angry events with themselves as the hero, they get to re-feel those powerful angry feelings, fueling the addiction and seeming to justify those actions. It is important to take responsibility for the anger, not glorify it.
Eye-rolling: People can communicate disgust and anger, non-verbally, by rolling their eyes, sighing or making mouth noises. By doing so, that can often raise the level of animosity by inflaming the other person. It is important to recognize what is being done and abstain from doing it.
Criticizing: It is not a responsibility to help everyone with anything they haven't asked for help or advice on. Criticizing and lecturing are no longer on the "to do" list.
Angry driving: Speeding, angry horn honking, cutting people off, and yelling at other drivers, are major ways to keep anger bubbling. Reformed addicts attempt to drive in a relaxed manner, regardless of how others are driving.