facebutt - Headbutting someone with your face. Like a faceplant so bad

Headbutting someone with your face. Like a faceplant so bad it looks like you tried to eat them and failed.

My facebutt was so bad I ended up in the hospital and my friend got a black eye.

I facebutted my brother because he wouldn’t stop teasing me.

I facebutted a guy in the hallway and now he thinks I’m a freak.