Jerry Lewis, Madeline Kahn, Marty Feldman and Pat Morita (as a miniturized Chinese Ambassador)
Based on a novel by Kurt Vonnegut.
"A rich, beautiful couple give birth to deformed alien twins who, when their heads are together, are the smartest kids on the planet."
Similar as Paul with "Nothing but Trouble" I saw this movie as a kid.
Here is what I remember....
Chicken shit powered cars drive with coops on their roof.
There are heavy incestual undertones between the deformed twins.
It was the most bleak view of the future I have ever seen in my life.
2.0 stars on IMDB
40% on Rotten Tomatoes (somehow)