Yes, but that would be a bad thing

Your body is flushing all that water into your intestines because it detected something bad and decided to get rid of it fast. The longer the bad thing stays, the worse, so it just firehose blast it out.

If you keep it in, first you’ll have to deal with the increased pressure, not good for your intestines. Then your body will have to deal with whatever it is that is bad for you.

Better just go to a bathroom and a doctor if you’re still having it after 2 days