pain bone 

A large, thick penis that is capable of hurting a partner during intercourse. A pain bone would be considered to be in the top 10% of large penises.

"Steve hung that pain bone in me last night, and now I can barely walk today !"

pain bone by Big Poppa South April 16, 2010

Pain-boner 

A type of boner that arises due to immense pain (usually gut pain or some internal pain) and is pretty embarassing coupled with explosive diarrhea.

guy: god dammit, i'm vomiting, and now I have a pain-boner. great.

Pain-boner by unused username November 27, 2023

Boner pain 

When your dick and gut hurts after having a boner for a long amount of time.

Ex:Jeff had a boner for 3 hours and had boner pain afterwards because of that girl he sat beside.

Boner pain by Putang puncher May 24, 2016