if you're asking about drinking too much water. The answer is yes. Too much consumed in a short amount of time can cause a dangerous imbalance in your electrolytes, possibly creating leg cramps, heart arrhythmias, diarrhea, vomiting, etc.
Yes there is. If you drink too much water you stand the risk if washing out necessary vitamins and minerals. Then there is the phenomena know as dry drowning. That's when a person drinks way too much water and the organs start shutting down.
There was a lady I worked with and she drank gallons of water every day. That was all she would drink besides one cola in the evening. Eventually you will leterally drown your self from the inside. You brain will swell and you will all the affects as if you drowned in a swimming pool.