Macked in the face
when you kiss someone so hard you're practically swallowing their face, and you're both too busy being gross to care about anything else.
They were making out so hard it looked like they were trying to eat each other’s brains.
He and his girlfriend were kissing like they were trying to get into each other’s skin.
They were so into it, they didn’t even notice the person walking in and saying, 'You two are gross.'