I am an alcoholic, but in a different form. I can go without alcohol indefinitely if I so choose. But if I do drink, I drink myself stupid......total RAGING binge alcoholic. I can't casual drink, like the person in question. In my view of alcoholism, I would consider the subject a casual drinker.
Though I do agree with Sr. Verde's opinion/conclusion....
its not like heavy drinking, or really bad but if someone 'only' smoked 5 cigarettes a day every day I would call them addicted... and being addicted to alcohol is considered being alcoholic yes?
I think, in this case, technically yes......realistically no. If its just an arguement...."you're a stoner".."yeah, well you're an alcoholic" kinda friendly back and forth banter......assuming you smoke weed everyday, I would say both would be right.
As long as it isn't running or dictating his/her life, I would say live and let live.
Just my opinion. Take care.