The act of something being fun and frustrating at the same time.
Getting the 200 flying rats in Grand theft auto 4 is a big pile of funstration.
The feeling you get while doing an activity that should be fun, but is actually the opposite. From fun + frustration.
Let's play Ninja Gaiden II, the most funstrating game of all time!
Our camping trip turned into a weekend of funstration after our canoe overturned.