Unicorn-Style

When a guy secures a strap-on to the top of his head and follows up by having sex with a girl, with said strap-on.

When a person places a strap-on dildo on their head and use it to fuck someone else in the ass or vagina

Noun: A sexual position in which one partner secures a strap on to the front of their head (where the horn on a unicorn is). They then get on all fours and stick the strap on in the second partner.