Originally Posted by Nanook

From the TSA website is the following:
"Some solid or powdered cosmetics items are permitted past the checkpoint; however, this is left to the discretion of the Security Officer. To minimize delays and hassle, we recommend that you pack all cosmetics in your checked baggage."

I guess it depends upon who looks in your back when you go through the security line. If that person isn't feeling well or just simply miserable, they may make you toss it.