Green’s Dictionary of Slang

ejaculation in one’s partner’s face.

1988		H. Max Gay (S)language 14: Facial, to Get a—to perform fellatio.
2001		Guardian Weekend 17 Mar. 9: I used not to do facials, but I do them now.
2009		J. Stahl Pain Killers 137: But they would do[...] Greek, Russian, bareback oral or facials.