She's been called "ghetto," "snarky" and "a horrible witness" on social media- but it's fair to say that 19-year-old Rachel Jeantel is far from polished. The star-witness in the George Zimmerman murder trial, Jeantel was on the phone with Trayvon Martin when the unarmed 17-year-old was shot to death by Zimmerman, who claims he did it self-defense. Besides Zimmerman, Jeantel was the last person to talk to Martin before he died. But her attitude in court has made her the subject of scrutiny online- she's responsible for getting "yessir" to trend on Twitter for repeating the phrase so often that it became comical to many. But one statement that has jaws dropping is her response to a question during her cross-examination by defense attorney Don West. After West inferred that Martin may have lied to Jeantel during their phone conversation, the Florida teen responded, "That's real retarded, sir. That's real retarded to do that, sir. Why on earth—? Trayvon did not know [Zimmerman]."