No. But it will make you rather queasy.

Not even remotely close to it. Cigarettes have 10-12mg of nicotine and the LD50 for ingestion is around 6-13mg/kg.

And that's assuming that the nicotine in tobacco is as bioavailable as pure nicotine.

Nah, not really. Sure it might make a non-smoker feel worse while it goes through them, one eaten cigarette isn't gonna kill an adult.

Now if it was the amount of nicotine out of an entire 20 pack, or someone being stupid enough to suck/chew on a daily nicotine patch, well that would be a different story.. 💀

If one does happen to have intestinal worms, well I think eating a cigarette is by far the lesser of the two discomforting evils...

No, the factoid is that there's enough nicotine in a single cigarette to kill you, if all of that nicotine got past your blood-brain barrier at once. Since that's more or less an impossibility, don't worry about eating one.

Wikipedia says the lethal dose is estimated to be 6.5 to 13 mg / kg of body weight. Following that, a cig couldn't possibly kill you. Probably not even when injected into a vein

I think if you made a tea to concentrate the nicotine it'd do it. That's how I've heard it used as a poison.