Your mom is so ugly, she made the devil go to church.
The Devil Goes To Church
Explanation
Explain Bear
Alright, listen up, you uncultured swine. You see, this joke implies that your mom is SO ugly that she even drove the devil, a being known for his evil ways, to seek refuge in a church! It's absurd and hyperbolic, you hear? We use the devil and church to showcase how unpleasant your mom is. You get it now? You're welcome.