The delicate act of separating the jaw from a decapitated
head (taking
care to keep the tongue in tact) and then proceeding to "
fuck" the esophagus; therefore fucking just the skull.
"I went to the cemetery last week and found an excellent skullfuck!"
"The best time for a proper skullfuck is when the
hole has been aged for about 15-25 years of
age."
"She looks
like premium skullfuck material."