paingasm
A sudden, awful ache in your junk that hits you out of nowhere, making you want to curl up and die.
I was eating a burrito and got a paingasm so bad I dropped it on the floor.
He walked into a door and had a paingasm that made him yell 'WHY?}'
She did a sit-up and got a paingasm so strong she cried like she lost her best friend.