Blueberry

In the video game series Battlefield someone who is not in your squad, but is on your team and has a blue dot over their head and is completely useless, often a n00b. You can not communicate with a blueberry, other than in game commands which are often ignored. Actions of a blueberry, including but not limited to: -Facing or running in the wrong direction of an objective. -Sitting on an objective instead of arming or defusing it. -Spawning in a vehicle and not moving. -Spawning as a pilot of an aerial vehicle and immediately crashing into the ground, flying out of bounds, or bailing out midflight, often resulting in death for all aboard. -Driving a vehicle taking damage and bailing out, allowing the enemy team to capture the vehicle. -Playing as a support or medic and not resupplying or healing teammates. -While in a tank... shooting at a target across the map instead of the tank shooting at him or the guy standing next to him with C4. -Locking a door or hatch behind them so you can't get on a roof. -Steal your vehicle that you are in the gunner seat of -Take off after you repair their vehicle instead of letting you back inside -Doesn't know where to return flag in CTF -Etc.