baboon kiss
When you butt head with someone, and it feels like they just kicked your butt. It's not love. It's more like a butt-butt betrayal.
I bumped butts with my mom. She looked like she wanted to murder me.
My friend and I bumped butts at school. It was like we were in a butt-butt betrayal.
I bumped butts with my crush. He looked like he wanted to punch me.