Definition & Meaning of "fart balls"in English

What is the origin of the term "fart balls" and how is it used?

"Fart balls" is a slang term that emerged in informal English, especially online and in youth or comedic contexts, in the late 20th to early 21st century. It combines "fart," representing immaturity, disgust, or bodily humor, with "balls" to intensify the crude effect and create a vivid insult. The term is used to mock someone as childish, gross, or contemptible, often in joking, teasing, or hostile speech. It is derogatory and vulgar, never neutral, but is generally understood as humorous in casual, informal, or online settings.