At the time of ejaculation whilst participating in a buttwank
the receiver waps there shit/cum broth soaked nob and slaps it in there partners face leaving a nob shaped imprint on there forehead.
Also leaving the broth 'shit & cum' stain all over there face.
"Alex wacked his wang out quickly from between Tom's butt cheeks and slapped Alex in the face whilst cuming."
"Oh my a Butt Broth Nob Slap you have given me"