Place it just after a character is introduced as rude or careless, then follow it with a fail cue to turn the chew into the joke's payoff, and save a bigger impact sound for the scene that follows.
关于此声音
This five-second clip is a close, wet gum chew with repeated smacks and sticky pulls, centred on the simple act of chewing. It feels silly and a little gross in the best way, the kind of noise that makes a listener grin and wince at the same time. It works as a small, everyday annoyance turned into a joke, with the chew itself carrying all the humour.