Literally, a human buzzkill, as Paraquat is used to killMarijuana thus literally killing potential buzz.
The Dude: You thought that Bunny had been kidnapped and you were fucking glad man. You could use it as an excuse to make some money disappear. All you needed was a sap to in it on, and you'd just met me. You...you...human paraquat!
In the 1960s, the Government sponsored a program called "Paraquat Pot" in which they sprayed the very harmful herbicide paraquat on marijuana fields in South America, which were distributed mostly to Americans. It was called Paraquat Pot.
Yeah, we used to smoke that paraquat pot back in the 60s. They just don't make itlike they used to.
Urban legend. Smoking marijuana sprayed with paraquat has no ill effects. The myth was propagated by anti-drug activists to deter the smoking of pot in general.
GullibleMoron: Oh shit, I hope I don't have the paraquat lung from this shwagg
Enlightened Skeptic: Don't worry, that's just a myth constructed by the fascists and religious fundamentalists who want to legislate morality.