Definition & Meaning of "felch"in English

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

Felch is a slang verb that appeared in mid-20th-century English to describe performing oral sex on a partner's anus to ingest semen. The word likely comes from Germanic or Yiddish sexual slang, where similar-sounding words meant "to suck" or "to lick." Over time, English speakers adopted it to label this specific act. Historically, it was vulgar and taboo, used to describe a sexual practice considered shocking or extreme. Today it remains obscene and offensive, used only in sexualized, informal, or subcultural contexts rather than polite conversation.