Not a word but a phrase actually. It means what it describes: definitely there is some intelligence in a stupid person. Trust me it's not easy been stupid. One has to be really intelligent to be a stupid person. Example: Yeah, I know--I gave a stupid description. But, you know, there really *is* intelligence in stupidity.
IINTELLIGENCE IN STUPIDITY
Meaning of IINTELLIGENCE IN STUPIDITY in English
Slang English vocab. Английский сленговый словарь. 2012