Here in the United States, some humorous euphemisms contain the word "challenged." 1. I am stupid at math. (Really!) Euphemism: I am mathematically challenged. 2. I am short (five feet five inches tall). Euphemism: I am vertically challenged. 3. I am not handsome. Euphemism: I am facially challenged.

This site has some interesting examples http://examples.yourdictionary.com/examples/examples-of-euphemism.html