When a man fucks a woman and you can see his
cock head pushing up into her abdomen.
Called this because it looks like an alien is about to
push out of her stomach like what happened to
Ripley in the movie Aliens.
Girl 1:
So what happened last night with
Dom?
Girl 2: Oh, it was so good. He gave me a ripley and when I saw his cock protruding from my stomach
I came instantly.