In one scene, the TV, playing up his Insane Proprietor act, pulls some pictures out of a cabinet. They're pictures of a topless woman with star pasties, but they're only visible for a second.
That might have just been a stylized bikini. (They do make them in that shape.) Still probably counts as Parental Bonus though.
Was changed to a full bikini top in later versions.
In the song "Worthless", the beach car originally sings the line "there were bikinis and buns, there were weenies". While it could just be reading too much into it, in the official soundtrack the line is changed to "there were bikinis and hot dogs and weenies", so apparently someone higher up caught on to the Double Entendre.
At least in an old VHS copy of the film, Lampy very clearly says, "To the showers!" in his flashback when his bulb burned out and he thinks he is a "goner." It is possible this was edited out of other versions, but you can find the quote listed on the film's Amazon.com page, and its Facebook group.
That could have been an intentional Holocaust reference, but most people are going to think it's a sports metaphor, which could have been the idea in the first place too.
Air Conditioner's line. "Hey, I'm real scared, Kirby. Whaddya gonna do, suck me to death?"