Dreams dictionary: Splash
Dreams dictionary: Interpretation 1
To dream that you are being splashed by water means that you need to be more expressive with your feelings. It also indicates your need to be revitalized.
Dreams dictionary: Interpretation 2
To dream that you splash someone implies that you want to share your excitement with those around you. If someone gets angry or complains about being splashed, then it means that you need to better contain your motions.