Jabberwocky
Frumious Bandersnatch
Funny you should mention this. Pure/concentrated nicotine is fatal in relatively small doses. Another little factoid I discovered at some point. Crazy shit (especially if you think that I've been smoking since about 15 i.e. for 40 years or so?).
And let's not get started on animal stuff (I know that'd be WAY off topic). But just yesterday: I watched a video (Sam Harris) talking about some or the other saliva of some or the frog that when vaporized and smoked it only takes one hit and you're into heroic dose psychedelic territory (I forget the compound it actually is i.e. it does have a name and which I'm sure will be all too familiar to many around these parts).
You are thinking of the Colorado River Toad. It has glands that pump out 5-MeO-DMT.