[Donald]

DEET is a good acetylcholinesterase inhibitor - certainly possible it has mild hallucinogenic effects.

[refurb]

https://en.m.wikipedia.org/wiki/DEET

DEET isn’t a cholinesterase inhibitor.

[selectodude]

Yes, but it’s commonly combined with carbamate which is.

[refurb]

Carbamate is an insecticide. In what insect repellent products is it combined with DEET?

And in terms of cholinesterase inhibition, there was a 2009 paper that said it was. Digging into it, it was when applied in vitro at a concentration of 20uM, which you’d need to drink hundreds of milliliters to achieve.

[CamperBob2]

Digging into it, it was when applied in vitro at a concentration of 20uM, which you’d need to drink hundreds of milliliters to achieve.

Which apparently is a thing that is done, going by the bizarre link in geomark's post above.

People are weird.