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.
DUDE! Grenade out of no where?!?! NOOB TUBE!!!
by Illitterate idieot May 2, 2011
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gay expression used by people in call of duty when they are tremendously embarassed by getting owned by a grendade launcher. If you get jealous, use it urself retard
When somebody in cod gets embarassed about getting shot by a grenade launcher, they get jealous and start to make fun of the person who owned them by saying "NOOB TUBE!"
by bluedevils1206 December 23, 2009
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The act of shitting in someone's mouth after they have passed out at a party.
Guy 1: Did you see zach at the party?

Guy2: Yeah, I saw someone Noob Tubing him....
by Sebekeron January 24, 2012
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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.
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!"
by Xynocron August 10, 2009
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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.
That little shit just noob tubed me, what a douche
by Jon jane February 16, 2010
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A weapon that is often employed by someone who is "new" to an FPS game and needs to use the maximum ammount of fire power just to "try" to survive, because noob's have no skill. Usually a Bazukka or rocket launcher. Hense the term "noob tube".
Maj. Poopinschaft: " Hay you killed me 10 times in a row....
I think I'll get you with a bazukka, because I have no skill ! "
cartOOnman: " Go ahead, Get your noob tube, I'll still bash you over the head with a 45. NYUK NYUK NYUK MUUhahahahahaha "
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