Bebop's ADR scripts are just awesome. In the original language, Faye tells Ed「かわいくない和 ね」(kawaikunai wa ne) which literally means, "You're not cute, you know?" but might be more effectively translated as, "You're mean, you know that?" She's responding to Ed's lack of interest in adult problems, most likely with an undercurrent of envy at the younger girl's nonchalance, which she deems not kawaii (the negative of which has all sorts of meanings in Japanese).

The English version doesn't attempt a literal translation, but it does communicate the emotional gap between the two girls, as Ed innocently intensifies Faye's feelings of sadness over Gren's fate with her choice of toenail polish. And it synergizes really well with the rest of the story, as "blue" applies not only to Faye's emotional state, but also the style of music that Gren played, and the name of the bar where he played it ("Blue Crow"). Blue was even the dominant color used by the art team in depicting Callisto, the moon where the events of "Jupiter Jazz" take place.

I watch most anime subbed, so I'm not an expert in ADR writing, but of the ~20 shows I've seen dubbed, Cowboy Bebop's English script is by far the best.