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.
Goddamn blueberry just wrecked the helicopter upon spawn, wtf?

Come on blueberry, capture the flag!
by TPP1776 January 17, 2017
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the best fruit in the world! soft, sweet (although sometimes sour), bite-sized! tastes bad after you brush your teeth.
Gosh I just brushed my teeth and I had blueberries... that was bad.
by freygeothewhy January 25, 2021
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Blueberries are the blue tasty round objects you find randomly in the forest. Some theorize that they are "berries" but scientist have proved that they are in fact homes of infant aliens.

Blueberries can also be to describe a really bad situation with a survival/success rate of only 1 to 100.000.000
Some dude: Did you see those blueberries near the forest? Man, if i had the time i'd make a blueberry pie.
Other dude: wtf man, why would you eat alien infants?

Some dude: Hey dude, you look like you are in some blueberries.
Other dude: yeah man, i don't think ill live to see another day, i'm in such a blueberry.
by GBlueberries April 30, 2018
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Blue balls of a juvenile (under the age of 18). Derogatory form of blue balls of an adult (age 18+) insinuating the person has little balls.
Kid: "Damn bro, the chicks in our high school always gave me a mean case of blueberries."

Or

Guy 1: "fuckin nuts are aching from that chick from the bar last night."

Guy 2: " haha, u got the blueberries!"

Guy 1: "fuck you!"
by Jarhead2275 June 1, 2017
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-THE BEST GANJA!
-Smells of fruit (i dont know the smell of an actual blueberry)
-Tastes like weed with a little bit of blueberry taste
-Better High than regular weed
-Not as hard of a burnout as regular weed
-quarter O of blueberry to my dome
- ludacris' song "Blueberry Yum Yum"
by roxors April 4, 2005
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A name in the game destiny for random that are not in your fireteam.
A damn blueberry just stole my kill!!!
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noun.
1. Queen Blue. The queen of Fruitdom. Possesses awesome fruit powers and mystical powers of randomness.
2. An expert in Ninja Nonsense.
3. A small berry that grows on a bush and is actually quite purple, in spite of its name.
"Bob knows everything!" ~Queen Blueberry
by Cassiopia&Blue November 30, 2011
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