Definition & Meaning of "shitfag"in English

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

Shitfag is a slang term that appeared in late 20th-century English as a highly offensive label for a gay man. It combines "shit," a crude insult implying worthlessness or disgust, with "fag," a longstanding derogatory term for homosexual men. Historically, it was extremely derogatory and insulting, used to demean or harass gay men. Today it remains vulgar and offensive, and its use is considered inappropriate outside discussions of historical or subcultural slang.