Alli: Making you lose weight by crapping your pants.

[SoSp]

No, seriously. I'm not kidding. Alli limits your intake by preventing the absorption of fat, which has the (intentional) side effect of punishing you if you go over your allowed amount of fat intake. It aversion therapy in a bottle.

Humorous write-up:

http://www.thewvsr.com/alli.htm

Real site:

http://www.myalli.com/howdoesitwork.aspx