"If brains were gasoline some people wouldn't have enough to drive a moped once around a cheerio." -unknown

this reminds me of one of my favorite descriptions of less-than-xyresic minds: "(S)he's a few fries short of a Happy Meal"

And of course, we cannot forget piece de resistance of put-downs: "I refuse to enter a battle of wits with someone who is so obviously unarmed"

bridget=)

Ipsa scientia potestas est ~Bacon