boston fakeout
While engaged in anal sex, the male spits on the females back, so she thinks he spent his load. She looks to see if this is the case. He then proceeds to ejaculate in her face.
Tom: Dude what did you do last night?
Steve: Me and Dani were doin' it, and then I gave her the Boston Fakeout.
Steve: Me and Dani were doin' it, and then I gave her the Boston Fakeout.