Pan-tard

A "Pan-tard" is a person who plays video games with tanks in them and body blocks his teammates who are trying to get to cover but refuses to move to let them to safety.

The word originates from a combination of the German word "panzer" for "tank" and "tard" a word used to convey that someone is of not smart or special needs decent.

Person 1: I love playing world of tanks, but these "Pan-tards" keep getting me killed.
Person 2: I know how you feel. Idiots who purposely get their teammates killed by body blocking them from cover are totally "Pan-tards"