Farrah Abraham went there -- and then some -- in her interview with Howard Stern Wednesday, delving into graphic detail about her sex life before declaring, "I'm not a [expletive]!"

The 22-year-old reality star told the radio icon, "I'm not a w***e, I'm not a [expletive], I'm not a c-word, if that's what you're calling me! I really tried not to have sex before marriage."

The Teen Mom star -- promoting her sex tape Farrah Superstar: Backdoor Teen Mom -- admitted that her late ex-boyfriend Derek Underwood (the father of her daughter Sophia) trumped her sex tape partner, James Deen, in the manhood department.