… just like you've shown?

> "Apples foo Bananas foo Grapes foo Oranges".split(" foo ")
["Apples", "Bananas", "Grapes", "Oranges"]

You could also use a regular expression as the delimiter:

> "Apples foo Bananas foo Grapes foo Oranges".split(/ *foo */)
["Apples", "Bananas", "Grapes", "Oranges"]