1: Someone who acts like a fucking idiot in such a way that it causes problems for others.
2: Anyone who engages in teamkilling, cheating, exploiting or just being an all around idiot in online firstperson shooters.
See also: Fucktard and Gayrod
We can't get up the fucking beach because that guy is 0-34 and he insists on using our only fuckingsniper rifle. What a fuckrod!!!