'Big Brother' Star Christmas Abbott's Baby Daddy Revenge Porn Case Dismissed

The father of Christmas Abbott's kid is off the hook in his revenge porn case ... as prosecutors in North Carolina have dropped all the charges against him.

According to new legal docs, obtained by TMZ, prosecutors dismissed the case against Benjamin Bunn -- who shares a 5-year-old son with the 'Big Brother' alum -- due to insufficient evidence.

We broke the story ... Bunn was arrested back in October, and hit with 3 counts of disclosure of private images after Christmas told cops Bunn was behind a fake online profile pretending to be her, and posting her adult content she published behind a paywall.

Police investigated and got a warrant to arrest Bunn, but now prosecutors say there just isn't enough evidence to bring this case before a jury.

Meanwhile, Christmas has also made domestic violence claims against her estranged husband Memphis Garrett, and even got a temporary restraining order against him before he filed for divorce.