An "occasional smoker" is a person who smokes cigarettes or other tobacco products but does not do it regularly or frequently. They may only smoke from time to time or on certain occasions. Full definition
The health risks are basically the same for occasional smokers — and the rates are often the same as well. (insurance.com)
Most insurers lump occasional smokers into the smokers classification. (insuranceblogbychris.com)
There was no comparison to different alcoholic and non-alcoholic beverages or whether the results would apply to more than just occasional smokers and drinkers. (sciencedaily.com)