Suck in air to your stomach and force it out like you are taking a dump.
How To Fake Burp?
Well I'm asking the same question, but most my friends say you just swallow air, then try to burp, then BOOM! YOU GOT IT!
Well, its all from your thoart make it vibrate like your doing a roar sound then... Well thats it I can't explain it but I'm really gd at it! x