noob tube

Meanings

1. A very overpowered firearm, especially a grenade launcher.

Etymology

From the sense that an overpowered weapon might make it easier for "noobs" (newcomers to the game) to succeed against experienced players. Originally stems from the Call of Duty franchise, where the under barrel grenade launcher attachment for an assault rifle became a preferred choice for many newcomer players due to its tendency to one-hit kill any opponents with ease.