hezekiaah said:

So had Jabba apparently done something atrocious or sexual to that dancer he kills? Is that why she freaks out, because she knows she's about to be...used in a way she hadn't anticipated? Or did she annoy Jabba somehow and that's why he dispense of her? There's never a translation to the scene, just her attempting to escape and ineffectively trying to persuade Jabba of something.

You see, the last time Jabba had his way with her, he had rough [butt sex] with her. Then, when asked to do it again (right then-and-there, no less), she threatened to call the Slave Girl Union (local 1138). Jabba panicked, and got rid of her before the Union Rep. showed up for work.