When a man stretches his nut sack over a girl or guys face and suffocates them with the ball skin as part of a sexual act. The face pushed through the thin skin resembles the featureless face of a burn victim. Also known as the "skin graft." Created and coined in philadelphia PA.

The act of strangling, nearly to asphyxiation, perhaps to semi-unconsciousness or unconsciousness, during sex.
In extreme circumstances, the expression "Struck her down'' can be used when unconsciousness occurs, especially when combined with the end of the female orgasm.
Transitive verb usage - "Struck you!"
A combination of the words strangle and fuck.