Definition & Meaning of "vaginal belch"in English

What is the origin of the term "vaginal belch" and how is it used?

"Vaginal belch" is a crude slang insult for a person regarded as contemptible, foolish, or disgusting. It appears to be a late 20th- or early 21st-century creation from shock-humor and online insult culture. The term deliberately compares a person to trapped air being expelled from the vagina, using an embarrassing bodily occurrence as a way to label someone as gross, ridiculous, or socially repellent. It is not used literally and has no sexual meaning beyond the imagery. The term is used only as a hostile or mocking insult and is highly vulgar, demeaning, and never neutral.