In summer I smoke 6-9 joints on an evening alone, I guess I'd be fcuked then. Anyway. You indeed have to use huge amounts of marijuana to overdose on it, so basically you can't call it an overdose anymore, because you can die from any substance. You can die from water, if you drink too much of it (which is really much, btw), and you can die from potatoes, lollypops, chocolate, anything. In that respect, it isn't the THC itself that kills you but the weed itself if you get what I mean.