Skullfucker (S'ck~uhll.fuh'ckurr) adj. Skullfuckery, verb. Skullfuck m/f Skullfucker:

A 'skullfucker' is someone who fucks you in the skull. Either in the eye socket, or mouth, or anywhere else where the penis can penetrate the skull, such as a hole smashed in the back of the skull with a hammer so you can feel the brains on your cock and shoot semen directly onto the area that gives people horrifying nightmares of dicks entering their skulls and shooting semen into their brains to impregnate them with the children of the master race of skullfuckers.

When you eat dirt for the first time and leave your family to build a shack in the woods

it means what it suggests. fucking someone in the face with no respect to the recipitant.

A person who sticks his penis in a person's eye.

An offensive term of a psychiatrist. A professional who specializes in the diagnosis and treatment of mental disorders.

a problem that baffles the mind usually while tripping on acid. OR a penis in the eye ear or nose

Skullfucking is just another name for intense oral sex where the "top" takes the lead and actually fucks the mouth until he shoots his load.