The liquid stool you're pooping out is most likely just Diarrhea and is caused by things such as illness, stomach flu, food poisoning or some other virus.
The diarrhea or liquid stool should go away within 1 to 2 days and if not then you may need to see a doctor or go to urgent care for treatment because it could be caused by something more serious.
When you have liquid poop or diarrhea you need to stay hydrated since the diarrhea can dehydrate you and also drink something such as pedialyte to help replace lost electrolytes when you have diarrhea.