It is a certain type of dress code in modern offices. People who adhere to such a dress code usually dress in business wear but it is either revealing, tight or otherwise borderline inappropriate. Note that this is not limited to women; men who decide to put on super-tight button-down shirts and pants can also be listed in this category.
"Mary is totally dressed business slutty; look at her hemline", said Mark who is wearing a super tight shirt that has buttons which seem to be a wrong move away from flying off.
