A Mandinga is simply a man from Dinga. Dinga is a town where such poeple like Chuck Norisoriginate from. So a man of Dinga can be considered a badass or a cool guy. So there for Mandinga is a slang word for a badass cool guy, maybe a friend, uncle, neihgbor, I dont know anyone who fits the discription. In other words, it is not a sex act or a devil, simply a comment or title given to someone.
Also know as the "bowling ball". The mandinga is performed by inserting your thumb and middle finger into your partner's vagina and butthole, respectively. You know if you have performed the mandinga correctly if your partner yells "Mandinga"! If she yells, "Ow!", you probably did it wrong.
See "Mandanga". Originally "mandinga", but was "Mutated" into "Mandanga" after TreeFroGG kept saying it to his wife "Leanne" and kept repeating her bullshit version..!! (It kinda stuck after that..!!)