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2.
when something fucks with your head. Your head is probably fucked if you're looking this up.
This math problem is so head fucking!
by paulTheMajestic March 06, 2013
 
1.
a grotesque act of reminiscing one's earliest day by burying the whole head into a woman's womb, through the vagina.
i wonder if head fucking is possible.
by misterO July 29, 2003