K Fail
A K fail is when you team up with a guy who thinks the game started yesterday. He can't do missions. He runs like a chicken to the front and dies. He rez's like a baby and uses the worst hero builds ever. K fail is the new noob.
I played with a K fail who thought the mission was a free-for-all. He ran in and got killed by three guys.
My friend teamed up with a K fail. He used a hero that couldn’t even attack.
I had to rez him three times because he kept dying to the first enemy.