A granade launcher in Call Of Duty 4 and WAW. Which takes no skill to use so people that are new to the game or just not good at it use.
by cagrown760 March 27, 2009
by Bojay Blues June 21, 2008
The Newbtube is a nickname for the Gernade Launcher attachment in the Call of Duty series. It is named that because newbies tend to use it as their only way to get kills, because it will kill their opponents in one shot.
by Fitty4ex May 22, 2008