Papoose says his estranged wife Remy Ma crossed the line by mentioning his children in her explosive rant yesterday … so he returned with some TNT of his own by telling the world his ex is capable of whorrible things!!!

We obtained Papoose’s divorce filing court docs on Friday, which cite the usual irreconcilable differences and requests for equal dissolution … but he put many more details on Instagram!!!

According to Pap, Remy cheated heavily throughout their marriage, even with a woman she was once imprisoned with, at one point.

He also accused Remy of habitually lying regarding her music career, success and all.

Fans have commented for years they can hear Pap’s influence in Remy’s music and he claimed to have written 90% of her catalog — including her signature hit “Conceited.”

Pap assures if you search through any of his phones, the lyrics he wrote for Remy will pop right up, but he had no issues being in her shadow because that’s the man he is.

Remy and Pap’s new flame, boxer Claressa Shields, also went back and forth with sideswipes on IG, mega fallout for the intense IG Lives.