Interstingly, the actual word "genius" sounds really fucked up if you say it while puking (much like "Buick" or "York").
Seriously, "genius" is a term people use to describe people who are smarter than they are only by a degree small enough that the person using the word can understand that the "genius" is smarter. You take it any further than that, and he will call him a moron, instead.
The Rev