She used to do this once a year. She is now doing it once a month.

For the second time in as many months, this former A list tweener actress who got her start on television before making millions in every kind of product she could sell and now makes tens of millions of dollars every year in a side business, had what she refers to as a cleanse.

Basically it means she goes on a five day drug bender and does not emerge from her house until all the drugs are gone.

She used to do this once a year. She is now doing it once a month.

Mary-Kate Olsen

Source: http://www.crazydaysandnights.net