Skull fuck or skull fucking is when a man sicks his dick into an un natural hole in a corpes head

Confused to the the point of near pain; psychologically unstable

1.the act of grabbing a partner's skull and putting your dick in their mouth, grabbing their skull and holding it still, therefore having sex with their skull.
2. a variation of face fuck

Skull Fuck- (verb) to make love to any orifce of the face. Such as poking out an eyeball and thrusting repeatedily into the orbital socket untill climak.

v. 1) To remove an/the eye of an entity (usually the mammilian boned creature, H. Sapian) from it socket and insert a phallus, or phallic object into the cavity, repeatedly. In the case of an actual penis being inserted, ocular-fornication is continued until ejaculation.
n. a reference to "Full Metal Jacket"

When you're giving a guy a head and he insists on thrusting.

A term used by the adult film industry to describe rough or aggressive oral sex the term and its use is credited to the adult film star Jonny toxic in the early 1990's. Descriptions of other origins and or activities are incorrect, the industry also refers to these actions as "forced" or "brutal" oral sex. The term is among the most searched terms in all of the adult film industry.