No. Your intestines are not rigid enough to withstand a vacuum strong enough to move liquid rapidly through you. Just look up any story about someone who sat on the drain valve of a pool and had their colon and parts of their large intestines sucked out their anus.
Do not go near those pool drains, no matter how good you think they feel on your butt. Those things will suck the intestines right out of you.
If you want to first drink a disgusting concentrated solution of chloridic acid that would literally burn your mouth... That's how far you can realistically get. It's closed after that