A nube tube is an under barrel mounted granade lancher use in the Call Of Duty games. They are called nube tubes because they are easy to kill with and typically only new people use them.
by Illitterate idieot May 24, 2011

The Grenade Launcher attachment for all Assault Rifles (Except MP44) in Call of Duty 4: Modern Warfare.
by Fertro June 02, 2008

by Sebekeron February 14, 2012

Noun.
Despite many saying that this is something specific to Call Of Duty 4 it is in fact a general term for any weapon that is cheap and/or over-powered in any video or computer game, usually a grenade launcher or RPG but also, especially with newer games, can be a shotgun (i.e. Call Of Duty, Half-Life 2, Rainbow 6) at least when up close. Use of it is commonly frowned upon unless used with some finesse or tactical forethought.
Despite many saying that this is something specific to Call Of Duty 4 it is in fact a general term for any weapon that is cheap and/or over-powered in any video or computer game, usually a grenade launcher or RPG but also, especially with newer games, can be a shotgun (i.e. Call Of Duty, Half-Life 2, Rainbow 6) at least when up close. Use of it is commonly frowned upon unless used with some finesse or tactical forethought.
Ex.1
Tom: "Dude, I was playing Halo 3 the other day some dude unloaded on me with the Mini-Gun."
Harry: " The Mini-Gun is such a Noob Tube"
Ex.2
Dick: "Gosh that guy just shot me with a Noob Tube."
Tom: "What a Noobish thing to do!"
Tom: "Dude, I was playing Halo 3 the other day some dude unloaded on me with the Mini-Gun."
Harry: " The Mini-Gun is such a Noob Tube"
Ex.2
Dick: "Gosh that guy just shot me with a Noob Tube."
Tom: "What a Noobish thing to do!"
by Xynocron August 09, 2009

A grenade launcher on modern warfare 1,2 that only douche bags and people with no skill use. They may only be used if you are trying to unlock the attachable shotgun.
by Jon jane February 15, 2010

A grenade launcher or rocket launcher noobs use in cod. Also is a item in the best game ever created called roblox which shoots noobs at people
Noob:I has a grenade launcher
Pro guy:you fucking noob you suck stop using noob tubes and learn to aim and quickscope you fucking faggot cunt
Noob: :(
Pro guy:you fucking noob you suck stop using noob tubes and learn to aim and quickscope you fucking faggot cunt
Noob: :(
by Lazylittlebastard May 30, 2019

Used in a very few servers on CoD4 and probably a variety of other Online FPS'. Usually servers that have decided to ban the use of the M203 Grenade Launcher.
by PHR4G March 16, 2009
