What is a felcher?

A felcher is a slang term for someone who engages in the sexual practice of inserting a straw or tube into the rectum of a partner after anal sex and sucking out the semen or other fluids. This act is considered to be extreme and potentially risky in terms of transmitting infections or causing injury. The term "felching" is often used as a joke or insult to mock someone's sexual behavior. It is not a common or widely accepted practice in mainstream sexual culture.