The act of ejaculating into your hand then smacking the person you just got done having sex with across the face with the ejaculate-filled hand, as though you were in an aftershave commercial.
She said she wanted my cum on her face, so I gave her the aftershave.
Amyl nitrate, better known as poppers. Popular amongst ravers, teenagers and the gay community.
"Hey dude, did you bring the aftershave?"
"Ohhh, wowwww tehehehe!"