Similar to fail, but at an even larger, more pitiful scale. Sometimes so pitiful or pathetic, some will either sympathize that person or will not say anything, due to the fail being so large that words cannot describe it.
Person 1: Hi, Tech Support? I need help with my computer, it seems to keep rebooting.
Person 2: Ok, before we do anything, have you tried rebooting?
Person 1: ._.
Conclusion: Person 2 has had an Epic Fail