Pain-boner
A boner that hurts so much, it feels like your gut is being tortured and your penis is about to throw a tantrum.
I got a pain-boner so bad, my gut was screaming, 'I quit!'
My boner was so painful, I thought my gut was going to start a rebellion.
After a boner that came with diarrhea, I felt like I was being punished by the devil.