This substitute teacher in Florida really wanted the principal to eat sh-t.

Heather Carpenter, a sub at Phillippi Shores Elementary School, will be arraigned Friday for allegedly sabotaging the principal’s party at a Sarasota park by dumping human feces on the grills and tables, news station WWSB reported.

Police said 42-year-old Carpenter was angry over a complaint she filed at school and wanted revenge on the principal.

The sub allegedly was witnessed in rubber gloves and a face mask around 6:30 a.m. Dec. 1 at Urfer Park putting fecal matter around the pavilion, which was reserved for the birthday party of the principal’s 6-year-old daughter.

Officers spoke to the principal who explained she had an ongoing dispute with a substitute teacher, who taught her daughter’s class. The detectives went to the home of Carpenter, who allegedly confessed to the act of revenge, officials said.

She told officers she flung the poop around the pavilion because she was upset over how a complaint she filed at school was being handled and wanted to disrupt the birthday festivities.

Carpenter was arrested Dec. 7 on suspicion of criminal mischief. She was released the next day on $2,500 bond, according to court records.