Place it at the end of a food or eating gag, after the setup and just before the reaction shot, so the payoff lands on it. Follow it with a classic fart sound for a one-two gross-out combo, or hit a vine boom right after for a bigger punchline.
About this sound
This clip is a loud burp lasting about one and a half seconds, with a deep, wet, guttural sound that rises and falls like a belch after a fizzy drink. It feels crude, silly, and instantly funny, the kind of gross-out noise that makes a room laugh or groan in the moment. It works as a shock gag because the sound is unmistakably human and over the top.