If you want to make yourself throw up you can mix some mustard with a glass of water and drink the mustard and water mixture.
After drinking the mustard and water mixture you'll be throwing up within 30 minutes.
You can also stick your finger in your mouth until it induces vomiting.
Another way to make yourself throw up is to gag yourself by acting like you're throwing up and eventually your stomach will release it's contents out of your mouth.