mindfuck, v. — Green’s Dictionary of Slang

mindfuck v.

1. (orig. US) to manipulate emotionally; to deceive, to tease, esp. while the victim is under the influence of drugs and thus less emotionally stable.

1968		L. Wolf Voices from the Love Generation 17: Their consciousness has been permanently altered [...] They’ve been mind-fucked.
1989		(con. 1960s) M. Kingston Tripmaster Monkey 179: It mind-fucks dogs to be called good when they’re trying to be fierce.
1992		R. Marcinko Rogue Warrior (1993) 192: I was a veteran of mind-fucking the Vietnamese.
2000		P. Beatty Tuff 166: I be mind-fucking hos, stupid.
2005		A. Lane Vulnerable 136: ‘And mind fucked her as well.’ Green added. ‘It wasn’t pretty — someone had laid a pretty stiff compulsion on her.’.
2013		F. Bill Donnybrook [ebook] Angus wanted to mind-fuck this Ned.

2. to subject to a fantasy act of intercourse.

2006

‘Annalise’ Venus Rising 136: Kiss me and consider yourself mind fucked anyway.

In derivatives

mind-fucked (adj.) (orig. US/US campus)

1. drunk, under the influence of drugs.

2002

D. Jelani-Miller Demon Siege 222: He felt hung over from too many tabs of acid. In a word: mind-fucked.

2. emotionally overcome.

1968		L. Wolf Voices from the Love Generation 280: mind-fucked. Profoundly influenced by something.
1979		R.D. Rosen Psychobabble 17: Are you mind-fucked, or just engaged in cortical foreplay? Are you a whole person or only a fraction thereof?
1987		R. Miller Slob 156: They both felt giddy, hysterical, a little confused, mind-fucked, spent.
2004		mindfucked.blogspot.com 🌐 Your consciousness has been permanently altered--you’ve been mindfucked!

3. unintelligent.

2002		posting at backwash.com 28 Jan. 🌐 Any party that will appoint a mindfucked nutcake moron to any position that has actual power doesn’t deserve to win ANY election.
2002		W. Harwood Autobiog. of God 116: Show me a human with no pride, and I’ll show you a contented slave, a contented beggar, or a contented mind-fucked god worshipper.