Somebody who does something incredibly stupid. An idiot.
After killing all the opposing players the last player goes to defuse the bomb but slips off the wall and kills himself - giving the win to the other team.
"Nice moves you donut!"
Used sarcastically in place of "Good Job". Esp. in the gaming community.
Player 1: Is friendly fire on?
Wolverine X: Did your nade blow up half your own team? Good game you noob.