The mixing of the following two drugs: Diphenhydramine (Antihistamine commonly known of as Benadryl, and when taken in high dosages can be a powerful deliriant) and MDMA, the drug commonly known as Ecstasy. Is known to create extremely interesting effects on the mind. Sometimes can be unnerving.

Don't recommend trying this unless you are interested in the experience. First try DPH (Diphenhydramine - Note, this isn't a fun drug to most) and MDMA (Ecstasy) separately if you haven't already.
Psychonaut 1: Hey man, have you tried Nightmare Flipping?
Psychonaut 2: Nah man what combo is that?
Psychonaut 1: It's a mixture of that deliriant Diphenhydramine and of course, Ecstasy.
Psychonaut 2: Woah, I never thought of trying that, sounds interesting!
by 1337w33d December 19, 2009
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a varial kickflip with an extra flip. so its like a pop shuvit + double kickflip.
yesterday i was tryin to varial the three flat two and i accidentally nightmare flipped it!
by m. sherm December 30, 2009
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When two drugs with opposing effects are administered at once for a novel experience. Typically a deliriant and a Psychedelic.
Wow, he just nightmare flipped Datura and LSD!

The teenager died from nightmare flipping DPH and psilocybin.
by Karix February 18, 2022
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Nightmare flip is taking all deliriant drugs:
•Datura
•Benzydamine(tantum rosa)
•DPH(Benadryl)
Hey it's called nightmare flip for a reason
Yoo Stephen just tried the nightmare flip now he's in the psych ward bro.
by RigaCrypto March 2, 2023
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