What is the fourth flavor of ice cream?

There isn't a universally recognized "fourth flavor" of ice cream. The most common flavors are usually considered to be:

* Vanilla: A classic and versatile base flavor.

* Chocolate: A rich and popular choice.

* Strawberry: A fruity and refreshing option.

While there are many other popular flavors like mint chocolate chip, cookies and cream, and coffee, these are not typically considered part of a set "big four" of flavors.

It really depends on personal preference and cultural context!