Noobtube 

A grenade launcher mounted underneath a gun, most commonly an assault rifle, in Call of Duty games. The word "Noobtube" comes from the player using it being a "noob" and the fact that the grenade launcher looks like a tube; hence the word Noobtube. Noobtubes carry 2 grenades that can also be refilled using the Scavenger perk or the highly despised One Man Army perk. They have a very large blast radius and enormous damage, leading to one hit kills even if the grenade lands 10-15 from the enemy. The most hated thing you can do with the Noobtube, is to join a domination game and shoot the Noobtube across the map at the beginning of the game into the enemies flag closest to their spawn, earning a 2-6 hit kill with one shot. The players using the Noobtube are called Noobtubers and are hated by many players in the gaming community because of the weapon requiring little effort to get kills with because of its high damage and blast radius. A Noobtubers K/D is usually quite high and they commonly achieve higher ranked killstreaks, (Pave low, Chopper gunner, AC-130, ect).

(Immature enemy)
Noobtuber kills enemy-
Enemy: OMG! Learn how to use a gun you dumb faggot Noobtuber!
Noobtuber: I'm just trying to play the objective and get kills, chill!
Enemy: (rage quits and joins a new game)
(Mature enemy)
Noobtuber kills enemy-
Enemy: (grunts in annoyance) that Noobtube is annoying but is is a weapon in the game and he is allowed to use it.
Noobtuber: Thank you! Someone understands! Want to be my friend?

Enemy: Sure!
(Noobtuber and enemy become friends and start a clan)

Noobtube by Infernostar December 25, 2012

NoobTube 

When some fagg on Cod uses a greanade launcher and kills you

Damn That bitch just noobtubed me

NoobTube by The Pizza man at your door March 4, 2010

noobtuber 

Person who uses a grenade launcher in the call of duty series who sucks balls

stupid noobtuber spawn tubed me and got a multikill..........faggat

noobtuber by noobtubee May 14, 2010

Noobtubified 

when yo ass gets pwnd by a gun mounted 'nade launcher

damn dude that dude just noobtubified me

Noobtubified by Peter, Matt, Cameron June 17, 2008

Noobtube 

Any grenade launcher attachment used in Call of Duty Modern Warfare, employed by n00bs of the highest caliber.

That n00b wont stop with the fucking Noobtube!!!!

Noobtube by that nigga cross the street November 21, 2011

noobtubbing 

Most popular in games like Halo or CoD, noobtubbing is the act of overly using of the Brute Shot or Barrel-mounted grenade launcher, respectively.

Doing this, more often than not, makes other players dislike you, avoid you, or call you a noob.

a nuke: Dude, the only wep he uses is the brute shot.
A Prinny Dood: Forget him. He's just noobtubbing. Let's join another server.

noobtubbing by pr1nn13s September 7, 2009

getting party noob tubed 

When your date passes out at a party, before you hook up.

Getting party noob tubed... My friend brought a girl to a party, she passed out early due to being too drunk, therefore makng her a "noob" at partying. Getting noob tubed is when someone in call of duty takes a grenade launcher and kills u with it. Only "noobs" use it and it's annoying to be killed by. So when a girl passs out early and you dont get to hook up with her... you were just party noob tubed. AKA pnt.

getting party noob tubed by subaru02wrx November 23, 2010