Definitions by Electrosphere

Gaijin server hamster

The Gaijin server hamster is a legendary creature that powers up the War Thunder servers with his hamster wheel. Sometimes he dies or faints, crashing the game until it gets replaced.

Player 1: "Man, my game just died out"
Player 2: "Must've been the Gaijin server hamster's fault

Gaijin server hamster by Electrosphere October 30, 2021

j out 

In the War Thunder slang, when your situation is so hopless that you'd rather keep pressing j (default key to adbandon veichle) and get back to hangar.

I was on fire and there was a Panther in front of me so i did just j out.

j out by Electrosphere June 10, 2021

R3 T20 

A very fast and nimble italian anti air, which was made popular in the MMO War Thunder because of players with tunnel vision that are unable to spot and counter it. Their primary complaint is that it's "too unrealistic" when in reality some R3s were fitted with stabilizers and night vision too.

Average WT Player: "Gaijin fix the R3 T20! It's OP!"
Actually good WT Player "Shut up and git gud"

R3 T20 by Electrosphere June 9, 2021

Rammer 

In the War Thunder slang, a player that crashes his veichle into another's player, this causes a lot of frustration for the victim's part.

All Xx_ESportReady_xX: "That biplane is a rammer, please report him"
All SoloWing: "Lol"

Rammer by Electrosphere June 9, 2021