A band that no one cared about until they defiled Dimebag Darrel's grave. Now used to describe an irreparable mistake with dire consequences. Also can be used to describe someone who ostracized themselves.
1.)"Last night I slept with my girlfriends sister. Totally nuclear hellfrosted myself. She found out and lit my shit on fire!"
2.) "I shit my pants in my cubicle today. Literally. I've been nuclear hellfrosted by my coworkers."
A hellpost is similar to a shitpost, but much much worse. It's a post that is so bad that it makes you feel like you've been trapped in hell for 900 years.
The phrase
"I love crunchy slime."
This is a hellpost. Reading it makes me wish the Earth would disintegrate and fling my wretched body into the sun, killing me instantly.