mindfuckern.
/ˈmʌɪn(d)ˌfʌkə/, U.S. /ˈmaɪn(d)ˌfəkər/ coarse slang.
1. Something that disturbs, astounds, or amazes.
ΘΚΠ
the mind > emotion > suffering > state of being upset or perturbed > [noun] > cause of > thing causing
startle-braina1652
mindfucker1969
1969 in J. E. Lighter Hist. Dict. Amer. Slang (1997) II. 559 This thing is a real mindfucker!
1971 Oz 34 42/1 Some gigs Jimi [Hendrix] was terrible, some nights he was good as it ever gets. His records generally contained, an equal mix of absolute killers, real total mindfuckers, and interesting little also-rans, marking-time things, ultimately just fillers.
1980 A. Maupin More Tales of City 135 Jon shook his head incredulously. ‘That is..a mind-fucker.’
1993 R. Rucker et al. Mondo 2000 (U.K. ed.) 71/1 It's a real mind-fucker.
2. A person who psychologically manipulates another.
ΘΚΠ
society > authority > power > influence > [noun] > one who or that which influences > influential person > sinister
Svengali1914
mindfucker1971
1971 E. E. Landy Underground Dict. 133 Mind fucker,..[a] person who attempts to manipulate another's thinking without consideration for the other.
1980 National Lampoon Aug. 67 You're some kind of mindfucker. You're a witch.
1992 Harper's Mag. May 36/1 In common usage, the term ‘mindfucker’ refers to someone who manipulates other people, who fucks them over emotionally or financially.
This is a new entry (OED Third Edition, March 2002; most recently modified version published online March 2022).
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n.1969