Yeah, that whole scene was weird. Freeze never talked like that before or after this episode, and the villains weren't shown to be particularly sexist (and even tried giving her a piece of the Gotham pie.) I guess they wanted to make it more obvious that Freeze was a ridiculously good guy for the sake of the joke, but it was still awkward.
The episode's A plot was really unfunny, the worst offender being King Shark's Beyonce line. Though, Clayface mispronouncing Lady Gaga's name was good.