To split the costs equally when on a date or other outing.
The expression to “go dutch” can be used for dates or for any social outing between friends. Friends going out for dinner or to some other social event will usually agree beforehand to “go dutch” so that it is clear that each person will pay his or her way.
In the context of romantic dates, the idea of going dutch can be problematic. It depends entirely on the people involved, but there is sometimes an assumption that the person who did the asking should be the one picking up the tab. For some, the idea of going dutch on a date would be welcome, especially on a first date where the person who was asked out might feel more comfortable paying his or her share.
The term “go dutch” was adapted from “Dutch Treat”, a derogatory phrase used by the British to describe the Dutch in the 17th century, when the two countries often found themselves at odds over trade routes. The Dutch had a reputation for being stingy, and the idea of a “Dutch Treat” meant there was no treat at all. This negative stereotyping no longer applies in current usage.