Foxx was on Fallon's show Thursday night and at one point Fallon tossed to a break. As he's tossing, Jamie is doing fake sign-language to the camera.
The audience laughed, but Nyle -- who is deaf -- is outraged. The winner of both "DWTS" and "America's Next Top Model" is shocked the skit was broadcast, saying, "How was this allowed? Where's the cultural sensitivity. Not comedy when you make fun of others."
Nyle had words for Foxx as well ... "It is straight up disrespectful to make up sign language. Everything is in gibberish."
1:00 PM PT -- DiMarco has posted a full statement.